Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
c1017a4c | 2 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | ||
1da177e4 LT |
26 | #include <linux/delay.h> |
27 | #include <linux/init.h> | |
28 | #include <linux/slab.h> | |
62932df8 IM |
29 | #include <linux/mutex.h> |
30 | ||
1da177e4 LT |
31 | #include <sound/core.h> |
32 | #include <sound/pcm.h> | |
33 | #include <sound/control.h> | |
34 | #include <sound/ac97_codec.h> | |
35 | #include <sound/asoundef.h> | |
1da177e4 LT |
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 | /* double rates */ | |
97 | { | |
98 | /* 3&4 front, 7&8 front (t+1) */ | |
99 | AC97_PCM_FRONT_DAC_RATE, /* slot 3 */ | |
100 | AC97_PCM_FRONT_DAC_RATE, /* slot 4 */ | |
101 | 0xff, /* slot 5 */ | |
102 | 0xff, /* slot 6 */ | |
103 | AC97_PCM_FRONT_DAC_RATE, /* slot 7 */ | |
104 | AC97_PCM_FRONT_DAC_RATE, /* slot 8 */ | |
105 | 0xff, /* slot 9 */ | |
106 | 0xff, /* slot 10 */ | |
107 | 0xff, /* slot 11 */ | |
108 | }, | |
109 | { | |
110 | /* not specified in the specification */ | |
111 | 0xff, /* slot 3 */ | |
112 | 0xff, /* slot 4 */ | |
113 | 0xff, /* slot 5 */ | |
114 | 0xff, /* slot 6 */ | |
115 | 0xff, /* slot 7 */ | |
116 | 0xff, /* slot 8 */ | |
117 | 0xff, /* slot 9 */ | |
118 | 0xff, /* slot 10 */ | |
119 | 0xff, /* slot 11 */ | |
120 | }, | |
121 | { | |
122 | 0xff, /* slot 3 */ | |
123 | 0xff, /* slot 4 */ | |
124 | 0xff, /* slot 5 */ | |
125 | 0xff, /* slot 6 */ | |
126 | 0xff, /* slot 7 */ | |
127 | 0xff, /* slot 8 */ | |
128 | 0xff, /* slot 9 */ | |
129 | 0xff, /* slot 10 */ | |
130 | 0xff, /* slot 11 */ | |
131 | }, | |
132 | { | |
133 | 0xff, /* slot 3 */ | |
134 | 0xff, /* slot 4 */ | |
135 | 0xff, /* slot 5 */ | |
136 | 0xff, /* slot 6 */ | |
137 | 0xff, /* slot 7 */ | |
138 | 0xff, /* slot 8 */ | |
139 | 0xff, /* slot 9 */ | |
140 | 0xff, /* slot 10 */ | |
141 | 0xff, /* slot 11 */ | |
142 | } | |
143 | }}; | |
144 | ||
145 | /* FIXME: more various mappings for ADC? */ | |
146 | static unsigned char rate_cregs[9] = { | |
147 | AC97_PCM_LR_ADC_RATE, /* 3 */ | |
148 | AC97_PCM_LR_ADC_RATE, /* 4 */ | |
149 | 0xff, /* 5 */ | |
150 | AC97_PCM_MIC_ADC_RATE, /* 6 */ | |
151 | 0xff, /* 7 */ | |
152 | 0xff, /* 8 */ | |
153 | 0xff, /* 9 */ | |
154 | 0xff, /* 10 */ | |
155 | 0xff, /* 11 */ | |
156 | }; | |
157 | ||
158 | static unsigned char get_slot_reg(struct ac97_pcm *pcm, unsigned short cidx, | |
159 | unsigned short slot, int dbl) | |
160 | { | |
161 | if (slot < 3) | |
162 | return 0xff; | |
163 | if (slot > 11) | |
164 | return 0xff; | |
165 | if (pcm->spdif) | |
166 | return AC97_SPDIF; /* pseudo register */ | |
167 | if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
168 | return rate_reg_tables[dbl][pcm->r[dbl].rate_table[cidx]][slot - 3]; | |
169 | else | |
170 | return rate_cregs[slot - 3]; | |
171 | } | |
172 | ||
ee42381e | 173 | static int set_spdif_rate(struct snd_ac97 *ac97, unsigned short rate) |
1da177e4 LT |
174 | { |
175 | unsigned short old, bits, reg, mask; | |
176 | unsigned int sbits; | |
177 | ||
178 | if (! (ac97->ext_id & AC97_EI_SPDIF)) | |
179 | return -ENODEV; | |
180 | ||
181 | /* TODO: double rate support */ | |
182 | if (ac97->flags & AC97_CS_SPDIF) { | |
183 | switch (rate) { | |
184 | case 48000: bits = 0; break; | |
185 | case 44100: bits = 1 << AC97_SC_SPSR_SHIFT; break; | |
186 | default: /* invalid - disable output */ | |
187 | snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); | |
188 | return -EINVAL; | |
189 | } | |
190 | reg = AC97_CSR_SPDIF; | |
191 | mask = 1 << AC97_SC_SPSR_SHIFT; | |
192 | } else { | |
193 | if (ac97->id == AC97_ID_CM9739 && rate != 48000) { | |
194 | snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); | |
195 | return -EINVAL; | |
196 | } | |
197 | switch (rate) { | |
198 | case 44100: bits = AC97_SC_SPSR_44K; break; | |
199 | case 48000: bits = AC97_SC_SPSR_48K; break; | |
200 | case 32000: bits = AC97_SC_SPSR_32K; break; | |
201 | default: /* invalid - disable output */ | |
202 | snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); | |
203 | return -EINVAL; | |
204 | } | |
205 | reg = AC97_SPDIF; | |
206 | mask = AC97_SC_SPSR_MASK; | |
207 | } | |
208 | ||
62932df8 | 209 | mutex_lock(&ac97->reg_mutex); |
1da177e4 LT |
210 | old = snd_ac97_read(ac97, reg) & mask; |
211 | if (old != bits) { | |
212 | snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); | |
213 | snd_ac97_update_bits_nolock(ac97, reg, mask, bits); | |
214 | /* update the internal spdif bits */ | |
215 | sbits = ac97->spdif_status; | |
216 | if (sbits & IEC958_AES0_PROFESSIONAL) { | |
217 | sbits &= ~IEC958_AES0_PRO_FS; | |
218 | switch (rate) { | |
219 | case 44100: sbits |= IEC958_AES0_PRO_FS_44100; break; | |
220 | case 48000: sbits |= IEC958_AES0_PRO_FS_48000; break; | |
221 | case 32000: sbits |= IEC958_AES0_PRO_FS_32000; break; | |
222 | } | |
223 | } else { | |
224 | sbits &= ~(IEC958_AES3_CON_FS << 24); | |
225 | switch (rate) { | |
226 | case 44100: sbits |= IEC958_AES3_CON_FS_44100<<24; break; | |
227 | case 48000: sbits |= IEC958_AES3_CON_FS_48000<<24; break; | |
228 | case 32000: sbits |= IEC958_AES3_CON_FS_32000<<24; break; | |
229 | } | |
230 | } | |
231 | ac97->spdif_status = sbits; | |
232 | } | |
233 | snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF); | |
62932df8 | 234 | mutex_unlock(&ac97->reg_mutex); |
1da177e4 LT |
235 | return 0; |
236 | } | |
237 | ||
238 | /** | |
239 | * snd_ac97_set_rate - change the rate of the given input/output. | |
240 | * @ac97: the ac97 instance | |
241 | * @reg: the register to change | |
242 | * @rate: the sample rate to set | |
243 | * | |
244 | * Changes the rate of the given input/output on the codec. | |
245 | * If the codec doesn't support VAR, the rate must be 48000 (except | |
246 | * for SPDIF). | |
247 | * | |
248 | * The valid registers are AC97_PMC_MIC_ADC_RATE, | |
249 | * AC97_PCM_FRONT_DAC_RATE, AC97_PCM_LR_ADC_RATE. | |
250 | * AC97_PCM_SURR_DAC_RATE and AC97_PCM_LFE_DAC_RATE are accepted | |
251 | * if the codec supports them. | |
252 | * AC97_SPDIF is accepted as a pseudo register to modify the SPDIF | |
253 | * status bits. | |
254 | * | |
255 | * Returns zero if successful, or a negative error code on failure. | |
256 | */ | |
ee42381e | 257 | int snd_ac97_set_rate(struct snd_ac97 *ac97, int reg, unsigned int rate) |
1da177e4 LT |
258 | { |
259 | int dbl; | |
260 | unsigned int tmp; | |
261 | ||
262 | dbl = rate > 48000; | |
263 | if (dbl) { | |
264 | if (!(ac97->flags & AC97_DOUBLE_RATE)) | |
265 | return -EINVAL; | |
266 | if (reg != AC97_PCM_FRONT_DAC_RATE) | |
267 | return -EINVAL; | |
268 | } | |
269 | ||
6dbe6628 | 270 | snd_ac97_update_power(ac97, reg, 1); |
1da177e4 LT |
271 | switch (reg) { |
272 | case AC97_PCM_MIC_ADC_RATE: | |
273 | if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */ | |
274 | if (rate != 48000) | |
275 | return -EINVAL; | |
276 | break; | |
277 | case AC97_PCM_FRONT_DAC_RATE: | |
278 | case AC97_PCM_LR_ADC_RATE: | |
279 | if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0) /* VRA */ | |
280 | if (rate != 48000 && rate != 96000) | |
281 | return -EINVAL; | |
282 | break; | |
283 | case AC97_PCM_SURR_DAC_RATE: | |
284 | if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC)) | |
285 | return -EINVAL; | |
286 | break; | |
287 | case AC97_PCM_LFE_DAC_RATE: | |
288 | if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) | |
289 | return -EINVAL; | |
290 | break; | |
291 | case AC97_SPDIF: | |
292 | /* special case */ | |
293 | return set_spdif_rate(ac97, rate); | |
294 | default: | |
295 | return -EINVAL; | |
296 | } | |
297 | if (dbl) | |
298 | rate /= 2; | |
299 | tmp = (rate * ac97->bus->clock) / 48000; | |
300 | if (tmp > 65535) | |
301 | return -EINVAL; | |
302 | if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) | |
303 | snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, | |
304 | AC97_EA_DRA, dbl ? AC97_EA_DRA : 0); | |
305 | snd_ac97_update(ac97, reg, tmp & 0xffff); | |
306 | snd_ac97_read(ac97, reg); | |
091e95ee TI |
307 | if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) { |
308 | /* Intel controllers require double rate data to be put in | |
309 | * slots 7+8 | |
310 | */ | |
311 | snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE, | |
312 | AC97_GP_DRSS_MASK, | |
313 | dbl ? AC97_GP_DRSS_78 : 0); | |
314 | snd_ac97_read(ac97, AC97_GENERAL_PURPOSE); | |
315 | } | |
1da177e4 LT |
316 | return 0; |
317 | } | |
318 | ||
7b09679c TI |
319 | EXPORT_SYMBOL(snd_ac97_set_rate); |
320 | ||
ee42381e | 321 | static unsigned short get_pslots(struct snd_ac97 *ac97, unsigned char *rate_table, unsigned short *spdif_slots) |
1da177e4 LT |
322 | { |
323 | if (!ac97_is_audio(ac97)) | |
324 | return 0; | |
325 | if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) { | |
326 | unsigned short slots = 0; | |
327 | if (ac97_is_rev22(ac97)) { | |
328 | /* Note: it's simply emulation of AMAP behaviour */ | |
329 | u16 es; | |
330 | es = ac97->regs[AC97_EXTENDED_ID] &= ~AC97_EI_DACS_SLOT_MASK; | |
331 | switch (ac97->addr) { | |
332 | case 1: | |
333 | case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break; | |
334 | case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break; | |
335 | } | |
336 | snd_ac97_write_cache(ac97, AC97_EXTENDED_ID, es); | |
337 | } | |
338 | switch (ac97->addr) { | |
339 | case 0: | |
340 | slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); | |
341 | if (ac97->scaps & AC97_SCAP_SURROUND_DAC) | |
342 | slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); | |
343 | if (ac97->scaps & AC97_SCAP_CENTER_LFE_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_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT); | |
348 | else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) | |
349 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); | |
350 | else | |
351 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); | |
352 | } | |
353 | *rate_table = 0; | |
354 | break; | |
355 | case 1: | |
356 | case 2: | |
357 | slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); | |
358 | if (ac97->scaps & AC97_SCAP_SURROUND_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_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); | |
363 | else | |
364 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); | |
365 | } | |
366 | *rate_table = 1; | |
367 | break; | |
368 | case 3: | |
369 | slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); | |
370 | if (ac97->ext_id & AC97_EI_SPDIF) | |
371 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); | |
372 | *rate_table = 2; | |
373 | break; | |
374 | } | |
375 | return slots; | |
376 | } else { | |
377 | unsigned short slots; | |
378 | slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); | |
379 | if (ac97->scaps & AC97_SCAP_SURROUND_DAC) | |
380 | slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); | |
381 | if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) | |
382 | slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); | |
383 | if (ac97->ext_id & AC97_EI_SPDIF) { | |
384 | if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) | |
385 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT); | |
386 | else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) | |
387 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); | |
388 | else | |
389 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); | |
390 | } | |
391 | *rate_table = 0; | |
392 | return slots; | |
393 | } | |
394 | } | |
395 | ||
ee42381e | 396 | static unsigned short get_cslots(struct snd_ac97 *ac97) |
1da177e4 LT |
397 | { |
398 | unsigned short slots; | |
399 | ||
400 | if (!ac97_is_audio(ac97)) | |
401 | return 0; | |
402 | slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); | |
403 | slots |= (1<<AC97_SLOT_MIC); | |
404 | return slots; | |
405 | } | |
406 | ||
407 | static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl) | |
408 | { | |
409 | int i, idx; | |
410 | unsigned int rates = ~0; | |
411 | unsigned char reg; | |
412 | ||
413 | for (i = 3; i < 12; i++) { | |
414 | if (!(slots & (1 << i))) | |
415 | continue; | |
416 | reg = get_slot_reg(pcm, cidx, i, dbl); | |
417 | switch (reg) { | |
418 | case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break; | |
419 | case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break; | |
420 | case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break; | |
421 | case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break; | |
422 | case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break; | |
423 | default: idx = AC97_RATES_SPDIF; break; | |
424 | } | |
425 | rates &= pcm->r[dbl].codec[cidx]->rates[idx]; | |
426 | } | |
427 | if (!dbl) | |
428 | rates &= ~(SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 | | |
429 | SNDRV_PCM_RATE_96000); | |
430 | return rates; | |
431 | } | |
432 | ||
433 | /** | |
434 | * snd_ac97_pcm_assign - assign AC97 slots to given PCM streams | |
435 | * @bus: the ac97 bus instance | |
436 | * @pcms_count: count of PCMs to be assigned | |
437 | * @pcms: PCMs to be assigned | |
438 | * | |
439 | * It assigns available AC97 slots for given PCMs. If none or only | |
440 | * some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members | |
441 | * are reduced and might be zero. | |
442 | */ | |
ee42381e | 443 | int snd_ac97_pcm_assign(struct snd_ac97_bus *bus, |
1da177e4 LT |
444 | unsigned short pcms_count, |
445 | const struct ac97_pcm *pcms) | |
446 | { | |
447 | int i, j, k; | |
448 | const struct ac97_pcm *pcm; | |
449 | struct ac97_pcm *rpcms, *rpcm; | |
450 | unsigned short avail_slots[2][4]; | |
451 | unsigned char rate_table[2][4]; | |
452 | unsigned short tmp, slots; | |
453 | unsigned short spdif_slots[4]; | |
454 | unsigned int rates; | |
ee42381e | 455 | struct snd_ac97 *codec; |
1da177e4 LT |
456 | |
457 | rpcms = kcalloc(pcms_count, sizeof(struct ac97_pcm), GFP_KERNEL); | |
458 | if (rpcms == NULL) | |
459 | return -ENOMEM; | |
460 | memset(avail_slots, 0, sizeof(avail_slots)); | |
461 | memset(rate_table, 0, sizeof(rate_table)); | |
462 | memset(spdif_slots, 0, sizeof(spdif_slots)); | |
463 | for (i = 0; i < 4; i++) { | |
464 | codec = bus->codec[i]; | |
465 | if (!codec) | |
466 | continue; | |
467 | avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]); | |
468 | avail_slots[1][i] = get_cslots(codec); | |
469 | if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) { | |
470 | for (j = 0; j < i; j++) { | |
471 | if (bus->codec[j]) | |
472 | avail_slots[1][i] &= ~avail_slots[1][j]; | |
473 | } | |
474 | } | |
475 | } | |
476 | /* first step - exclusive devices */ | |
477 | for (i = 0; i < pcms_count; i++) { | |
478 | pcm = &pcms[i]; | |
479 | rpcm = &rpcms[i]; | |
480 | /* low-level driver thinks that it's more clever */ | |
481 | if (pcm->copy_flag) { | |
482 | *rpcm = *pcm; | |
483 | continue; | |
484 | } | |
485 | rpcm->stream = pcm->stream; | |
486 | rpcm->exclusive = pcm->exclusive; | |
487 | rpcm->spdif = pcm->spdif; | |
488 | rpcm->private_value = pcm->private_value; | |
489 | rpcm->bus = bus; | |
490 | rpcm->rates = ~0; | |
491 | slots = pcm->r[0].slots; | |
492 | for (j = 0; j < 4 && slots; j++) { | |
493 | if (!bus->codec[j]) | |
494 | continue; | |
495 | rates = ~0; | |
496 | if (pcm->spdif && pcm->stream == 0) | |
497 | tmp = spdif_slots[j]; | |
498 | else | |
499 | tmp = avail_slots[pcm->stream][j]; | |
500 | if (pcm->exclusive) { | |
501 | /* exclusive access */ | |
502 | tmp &= slots; | |
503 | for (k = 0; k < i; k++) { | |
504 | if (rpcm->stream == rpcms[k].stream) | |
505 | tmp &= ~rpcms[k].r[0].rslots[j]; | |
506 | } | |
507 | } else { | |
508 | /* non-exclusive access */ | |
509 | tmp &= pcm->r[0].slots; | |
510 | } | |
511 | if (tmp) { | |
512 | rpcm->r[0].rslots[j] = tmp; | |
513 | rpcm->r[0].codec[j] = bus->codec[j]; | |
514 | rpcm->r[0].rate_table[j] = rate_table[pcm->stream][j]; | |
515 | if (bus->no_vra) | |
516 | rates = SNDRV_PCM_RATE_48000; | |
517 | else | |
518 | rates = get_rates(rpcm, j, tmp, 0); | |
519 | if (pcm->exclusive) | |
520 | avail_slots[pcm->stream][j] &= ~tmp; | |
521 | } | |
522 | slots &= ~tmp; | |
523 | rpcm->r[0].slots |= tmp; | |
524 | rpcm->rates &= rates; | |
525 | } | |
526 | /* for double rate, we check the first codec only */ | |
527 | if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
528 | bus->codec[0] && (bus->codec[0]->flags & AC97_DOUBLE_RATE) && | |
529 | rate_table[pcm->stream][0] == 0) { | |
530 | tmp = (1<<AC97_SLOT_PCM_LEFT) | (1<<AC97_SLOT_PCM_RIGHT) | | |
531 | (1<<AC97_SLOT_PCM_LEFT_0) | (1<<AC97_SLOT_PCM_RIGHT_0); | |
532 | if ((tmp & pcm->r[1].slots) == tmp) { | |
533 | rpcm->r[1].slots = tmp; | |
534 | rpcm->r[1].rslots[0] = tmp; | |
535 | rpcm->r[1].rate_table[0] = 0; | |
536 | rpcm->r[1].codec[0] = bus->codec[0]; | |
537 | if (pcm->exclusive) | |
538 | avail_slots[pcm->stream][0] &= ~tmp; | |
539 | if (bus->no_vra) | |
540 | rates = SNDRV_PCM_RATE_96000; | |
541 | else | |
542 | rates = get_rates(rpcm, 0, tmp, 1); | |
543 | rpcm->rates |= rates; | |
544 | } | |
545 | } | |
546 | if (rpcm->rates == ~0) | |
547 | rpcm->rates = 0; /* not used */ | |
548 | } | |
549 | bus->pcms_count = pcms_count; | |
550 | bus->pcms = rpcms; | |
551 | return 0; | |
552 | } | |
553 | ||
7b09679c TI |
554 | EXPORT_SYMBOL(snd_ac97_pcm_assign); |
555 | ||
1da177e4 LT |
556 | /** |
557 | * snd_ac97_pcm_open - opens the given AC97 pcm | |
558 | * @pcm: the ac97 pcm instance | |
559 | * @rate: rate in Hz, if codec does not support VRA, this value must be 48000Hz | |
560 | * @cfg: output stream characteristics | |
561 | * @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm | |
562 | * | |
563 | * It locks the specified slots and sets the given rate to AC97 registers. | |
564 | */ | |
565 | int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate, | |
566 | enum ac97_pcm_cfg cfg, unsigned short slots) | |
567 | { | |
ee42381e | 568 | struct snd_ac97_bus *bus; |
1da177e4 LT |
569 | int i, cidx, r, ok_flag; |
570 | unsigned int reg_ok[4] = {0,0,0,0}; | |
571 | unsigned char reg; | |
572 | int err = 0; | |
573 | ||
574 | r = rate > 48000; | |
575 | bus = pcm->bus; | |
576 | if (cfg == AC97_PCM_CFG_SPDIF) { | |
1da177e4 LT |
577 | for (cidx = 0; cidx < 4; cidx++) |
578 | if (bus->codec[cidx] && (bus->codec[cidx]->ext_id & AC97_EI_SPDIF)) { | |
579 | err = set_spdif_rate(bus->codec[cidx], rate); | |
580 | if (err < 0) | |
581 | return err; | |
582 | } | |
583 | } | |
584 | spin_lock_irq(&pcm->bus->bus_lock); | |
585 | for (i = 3; i < 12; i++) { | |
586 | if (!(slots & (1 << i))) | |
587 | continue; | |
588 | ok_flag = 0; | |
589 | for (cidx = 0; cidx < 4; cidx++) { | |
590 | if (bus->used_slots[pcm->stream][cidx] & (1 << i)) { | |
591 | spin_unlock_irq(&pcm->bus->bus_lock); | |
592 | err = -EBUSY; | |
593 | goto error; | |
594 | } | |
595 | if (pcm->r[r].rslots[cidx] & (1 << i)) { | |
596 | bus->used_slots[pcm->stream][cidx] |= (1 << i); | |
597 | ok_flag++; | |
598 | } | |
599 | } | |
600 | if (!ok_flag) { | |
601 | spin_unlock_irq(&pcm->bus->bus_lock); | |
602 | snd_printk(KERN_ERR "cannot find configuration for AC97 slot %i\n", i); | |
603 | err = -EAGAIN; | |
604 | goto error; | |
605 | } | |
606 | } | |
6dbe6628 | 607 | pcm->cur_dbl = r; |
1da177e4 LT |
608 | spin_unlock_irq(&pcm->bus->bus_lock); |
609 | for (i = 3; i < 12; i++) { | |
610 | if (!(slots & (1 << i))) | |
611 | continue; | |
612 | for (cidx = 0; cidx < 4; cidx++) { | |
613 | if (pcm->r[r].rslots[cidx] & (1 << i)) { | |
614 | reg = get_slot_reg(pcm, cidx, i, r); | |
615 | if (reg == 0xff) { | |
616 | snd_printk(KERN_ERR "invalid AC97 slot %i?\n", i); | |
617 | continue; | |
618 | } | |
619 | if (reg_ok[cidx] & (1 << (reg - AC97_PCM_FRONT_DAC_RATE))) | |
620 | continue; | |
621 | //printk(KERN_DEBUG "setting ac97 reg 0x%x to rate %d\n", reg, rate); | |
622 | err = snd_ac97_set_rate(pcm->r[r].codec[cidx], reg, rate); | |
623 | if (err < 0) | |
624 | snd_printk(KERN_ERR "error in snd_ac97_set_rate: cidx=%d, reg=0x%x, rate=%d, err=%d\n", cidx, reg, rate, err); | |
625 | else | |
626 | reg_ok[cidx] |= (1 << (reg - AC97_PCM_FRONT_DAC_RATE)); | |
627 | } | |
628 | } | |
629 | } | |
630 | pcm->aslots = slots; | |
631 | return 0; | |
632 | ||
633 | error: | |
634 | pcm->aslots = slots; | |
635 | snd_ac97_pcm_close(pcm); | |
636 | return err; | |
637 | } | |
638 | ||
7b09679c TI |
639 | EXPORT_SYMBOL(snd_ac97_pcm_open); |
640 | ||
1da177e4 LT |
641 | /** |
642 | * snd_ac97_pcm_close - closes the given AC97 pcm | |
643 | * @pcm: the ac97 pcm instance | |
644 | * | |
645 | * It frees the locked AC97 slots. | |
646 | */ | |
647 | int snd_ac97_pcm_close(struct ac97_pcm *pcm) | |
648 | { | |
ee42381e | 649 | struct snd_ac97_bus *bus; |
1da177e4 LT |
650 | unsigned short slots = pcm->aslots; |
651 | int i, cidx; | |
652 | ||
6dbe6628 TI |
653 | #ifdef CONFIG_SND_AC97_POWER_SAVE |
654 | int r = pcm->cur_dbl; | |
655 | for (i = 3; i < 12; i++) { | |
656 | if (!(slots & (1 << i))) | |
657 | continue; | |
658 | for (cidx = 0; cidx < 4; cidx++) { | |
659 | if (pcm->r[r].rslots[cidx] & (1 << i)) { | |
660 | int reg = get_slot_reg(pcm, cidx, i, r); | |
661 | snd_ac97_update_power(pcm->r[r].codec[cidx], | |
662 | reg, 0); | |
663 | } | |
664 | } | |
665 | } | |
666 | #endif | |
667 | ||
1da177e4 LT |
668 | bus = pcm->bus; |
669 | spin_lock_irq(&pcm->bus->bus_lock); | |
670 | for (i = 3; i < 12; i++) { | |
671 | if (!(slots & (1 << i))) | |
672 | continue; | |
673 | for (cidx = 0; cidx < 4; cidx++) | |
674 | bus->used_slots[pcm->stream][cidx] &= ~(1 << i); | |
675 | } | |
676 | pcm->aslots = 0; | |
6dbe6628 | 677 | pcm->cur_dbl = 0; |
1da177e4 LT |
678 | spin_unlock_irq(&pcm->bus->bus_lock); |
679 | return 0; | |
680 | } | |
681 | ||
7b09679c TI |
682 | EXPORT_SYMBOL(snd_ac97_pcm_close); |
683 | ||
ee42381e TI |
684 | static int double_rate_hw_constraint_rate(struct snd_pcm_hw_params *params, |
685 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 686 | { |
ee42381e | 687 | struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
1da177e4 | 688 | if (channels->min > 2) { |
ee42381e | 689 | static const struct snd_interval single_rates = { |
1da177e4 LT |
690 | .min = 1, |
691 | .max = 48000, | |
692 | }; | |
ee42381e | 693 | struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
1da177e4 LT |
694 | return snd_interval_refine(rate, &single_rates); |
695 | } | |
696 | return 0; | |
697 | } | |
698 | ||
ee42381e TI |
699 | static int double_rate_hw_constraint_channels(struct snd_pcm_hw_params *params, |
700 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 701 | { |
ee42381e | 702 | struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
1da177e4 | 703 | if (rate->min > 48000) { |
ee42381e | 704 | static const struct snd_interval double_rate_channels = { |
1da177e4 LT |
705 | .min = 2, |
706 | .max = 2, | |
707 | }; | |
ee42381e | 708 | struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
1da177e4 LT |
709 | return snd_interval_refine(channels, &double_rate_channels); |
710 | } | |
711 | return 0; | |
712 | } | |
713 | ||
714 | /** | |
715 | * snd_ac97_pcm_double_rate_rules - set double rate constraints | |
716 | * @runtime: the runtime of the ac97 front playback pcm | |
717 | * | |
718 | * Installs the hardware constraint rules to prevent using double rates and | |
719 | * more than two channels at the same time. | |
720 | */ | |
ee42381e | 721 | int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
722 | { |
723 | int err; | |
724 | ||
725 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
726 | double_rate_hw_constraint_rate, NULL, | |
727 | SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
728 | if (err < 0) | |
729 | return err; | |
730 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
731 | double_rate_hw_constraint_channels, NULL, | |
732 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
733 | return err; | |
734 | } | |
7b09679c TI |
735 | |
736 | EXPORT_SYMBOL(snd_ac97_pcm_double_rate_rules); |