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1da177e4 LT |
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> | |
62932df8 IM |
30 | #include <linux/mutex.h> |
31 | ||
1da177e4 LT |
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 | ||
ee42381e | 175 | static int set_spdif_rate(struct snd_ac97 *ac97, unsigned short rate) |
1da177e4 LT |
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 | ||
62932df8 | 211 | mutex_lock(&ac97->reg_mutex); |
1da177e4 LT |
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); | |
62932df8 | 236 | mutex_unlock(&ac97->reg_mutex); |
1da177e4 LT |
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 | */ | |
ee42381e | 259 | int snd_ac97_set_rate(struct snd_ac97 *ac97, int reg, unsigned int rate) |
1da177e4 LT |
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 | ||
6dbe6628 | 272 | snd_ac97_update_power(ac97, reg, 1); |
1da177e4 LT |
273 | switch (reg) { |
274 | case AC97_PCM_MIC_ADC_RATE: | |
275 | if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRM) == 0) /* MIC VRA */ | |
276 | if (rate != 48000) | |
277 | return -EINVAL; | |
278 | break; | |
279 | case AC97_PCM_FRONT_DAC_RATE: | |
280 | case AC97_PCM_LR_ADC_RATE: | |
281 | if ((ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_VRA) == 0) /* VRA */ | |
282 | if (rate != 48000 && rate != 96000) | |
283 | return -EINVAL; | |
284 | break; | |
285 | case AC97_PCM_SURR_DAC_RATE: | |
286 | if (! (ac97->scaps & AC97_SCAP_SURROUND_DAC)) | |
287 | return -EINVAL; | |
288 | break; | |
289 | case AC97_PCM_LFE_DAC_RATE: | |
290 | if (! (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) | |
291 | return -EINVAL; | |
292 | break; | |
293 | case AC97_SPDIF: | |
294 | /* special case */ | |
295 | return set_spdif_rate(ac97, rate); | |
296 | default: | |
297 | return -EINVAL; | |
298 | } | |
299 | if (dbl) | |
300 | rate /= 2; | |
301 | tmp = (rate * ac97->bus->clock) / 48000; | |
302 | if (tmp > 65535) | |
303 | return -EINVAL; | |
304 | if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) | |
305 | snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, | |
306 | AC97_EA_DRA, dbl ? AC97_EA_DRA : 0); | |
307 | snd_ac97_update(ac97, reg, tmp & 0xffff); | |
308 | snd_ac97_read(ac97, reg); | |
091e95ee TI |
309 | if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) { |
310 | /* Intel controllers require double rate data to be put in | |
311 | * slots 7+8 | |
312 | */ | |
313 | snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE, | |
314 | AC97_GP_DRSS_MASK, | |
315 | dbl ? AC97_GP_DRSS_78 : 0); | |
316 | snd_ac97_read(ac97, AC97_GENERAL_PURPOSE); | |
317 | } | |
1da177e4 LT |
318 | return 0; |
319 | } | |
320 | ||
7b09679c TI |
321 | EXPORT_SYMBOL(snd_ac97_set_rate); |
322 | ||
ee42381e | 323 | static unsigned short get_pslots(struct snd_ac97 *ac97, unsigned char *rate_table, unsigned short *spdif_slots) |
1da177e4 LT |
324 | { |
325 | if (!ac97_is_audio(ac97)) | |
326 | return 0; | |
327 | if (ac97_is_rev22(ac97) || ac97_can_amap(ac97)) { | |
328 | unsigned short slots = 0; | |
329 | if (ac97_is_rev22(ac97)) { | |
330 | /* Note: it's simply emulation of AMAP behaviour */ | |
331 | u16 es; | |
332 | es = ac97->regs[AC97_EXTENDED_ID] &= ~AC97_EI_DACS_SLOT_MASK; | |
333 | switch (ac97->addr) { | |
334 | case 1: | |
335 | case 2: es |= (1<<AC97_EI_DACS_SLOT_SHIFT); break; | |
336 | case 3: es |= (2<<AC97_EI_DACS_SLOT_SHIFT); break; | |
337 | } | |
338 | snd_ac97_write_cache(ac97, AC97_EXTENDED_ID, es); | |
339 | } | |
340 | switch (ac97->addr) { | |
341 | case 0: | |
342 | slots |= (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); | |
343 | if (ac97->scaps & AC97_SCAP_SURROUND_DAC) | |
344 | slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); | |
345 | if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) | |
346 | slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); | |
347 | if (ac97->ext_id & AC97_EI_SPDIF) { | |
348 | if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) | |
349 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT); | |
350 | else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) | |
351 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); | |
352 | else | |
353 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); | |
354 | } | |
355 | *rate_table = 0; | |
356 | break; | |
357 | case 1: | |
358 | case 2: | |
359 | slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); | |
360 | if (ac97->scaps & AC97_SCAP_SURROUND_DAC) | |
361 | slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); | |
362 | if (ac97->ext_id & AC97_EI_SPDIF) { | |
363 | if (!(ac97->scaps & AC97_SCAP_SURROUND_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 = 1; | |
369 | break; | |
370 | case 3: | |
371 | slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); | |
372 | if (ac97->ext_id & AC97_EI_SPDIF) | |
373 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); | |
374 | *rate_table = 2; | |
375 | break; | |
376 | } | |
377 | return slots; | |
378 | } else { | |
379 | unsigned short slots; | |
380 | slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); | |
381 | if (ac97->scaps & AC97_SCAP_SURROUND_DAC) | |
382 | slots |= (1<<AC97_SLOT_PCM_SLEFT)|(1<<AC97_SLOT_PCM_SRIGHT); | |
383 | if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) | |
384 | slots |= (1<<AC97_SLOT_PCM_CENTER)|(1<<AC97_SLOT_LFE); | |
385 | if (ac97->ext_id & AC97_EI_SPDIF) { | |
386 | if (!(ac97->scaps & AC97_SCAP_SURROUND_DAC)) | |
387 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT)|(1<<AC97_SLOT_SPDIF_RIGHT); | |
388 | else if (!(ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)) | |
389 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT1)|(1<<AC97_SLOT_SPDIF_RIGHT1); | |
390 | else | |
391 | *spdif_slots = (1<<AC97_SLOT_SPDIF_LEFT2)|(1<<AC97_SLOT_SPDIF_RIGHT2); | |
392 | } | |
393 | *rate_table = 0; | |
394 | return slots; | |
395 | } | |
396 | } | |
397 | ||
ee42381e | 398 | static unsigned short get_cslots(struct snd_ac97 *ac97) |
1da177e4 LT |
399 | { |
400 | unsigned short slots; | |
401 | ||
402 | if (!ac97_is_audio(ac97)) | |
403 | return 0; | |
404 | slots = (1<<AC97_SLOT_PCM_LEFT)|(1<<AC97_SLOT_PCM_RIGHT); | |
405 | slots |= (1<<AC97_SLOT_MIC); | |
406 | return slots; | |
407 | } | |
408 | ||
409 | static unsigned int get_rates(struct ac97_pcm *pcm, unsigned int cidx, unsigned short slots, int dbl) | |
410 | { | |
411 | int i, idx; | |
412 | unsigned int rates = ~0; | |
413 | unsigned char reg; | |
414 | ||
415 | for (i = 3; i < 12; i++) { | |
416 | if (!(slots & (1 << i))) | |
417 | continue; | |
418 | reg = get_slot_reg(pcm, cidx, i, dbl); | |
419 | switch (reg) { | |
420 | case AC97_PCM_FRONT_DAC_RATE: idx = AC97_RATES_FRONT_DAC; break; | |
421 | case AC97_PCM_SURR_DAC_RATE: idx = AC97_RATES_SURR_DAC; break; | |
422 | case AC97_PCM_LFE_DAC_RATE: idx = AC97_RATES_LFE_DAC; break; | |
423 | case AC97_PCM_LR_ADC_RATE: idx = AC97_RATES_ADC; break; | |
424 | case AC97_PCM_MIC_ADC_RATE: idx = AC97_RATES_MIC_ADC; break; | |
425 | default: idx = AC97_RATES_SPDIF; break; | |
426 | } | |
427 | rates &= pcm->r[dbl].codec[cidx]->rates[idx]; | |
428 | } | |
429 | if (!dbl) | |
430 | rates &= ~(SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_88200 | | |
431 | SNDRV_PCM_RATE_96000); | |
432 | return rates; | |
433 | } | |
434 | ||
435 | /** | |
436 | * snd_ac97_pcm_assign - assign AC97 slots to given PCM streams | |
437 | * @bus: the ac97 bus instance | |
438 | * @pcms_count: count of PCMs to be assigned | |
439 | * @pcms: PCMs to be assigned | |
440 | * | |
441 | * It assigns available AC97 slots for given PCMs. If none or only | |
442 | * some slots are available, pcm->xxx.slots and pcm->xxx.rslots[] members | |
443 | * are reduced and might be zero. | |
444 | */ | |
ee42381e | 445 | int snd_ac97_pcm_assign(struct snd_ac97_bus *bus, |
1da177e4 LT |
446 | unsigned short pcms_count, |
447 | const struct ac97_pcm *pcms) | |
448 | { | |
449 | int i, j, k; | |
450 | const struct ac97_pcm *pcm; | |
451 | struct ac97_pcm *rpcms, *rpcm; | |
452 | unsigned short avail_slots[2][4]; | |
453 | unsigned char rate_table[2][4]; | |
454 | unsigned short tmp, slots; | |
455 | unsigned short spdif_slots[4]; | |
456 | unsigned int rates; | |
ee42381e | 457 | struct snd_ac97 *codec; |
1da177e4 LT |
458 | |
459 | rpcms = kcalloc(pcms_count, sizeof(struct ac97_pcm), GFP_KERNEL); | |
460 | if (rpcms == NULL) | |
461 | return -ENOMEM; | |
462 | memset(avail_slots, 0, sizeof(avail_slots)); | |
463 | memset(rate_table, 0, sizeof(rate_table)); | |
464 | memset(spdif_slots, 0, sizeof(spdif_slots)); | |
465 | for (i = 0; i < 4; i++) { | |
466 | codec = bus->codec[i]; | |
467 | if (!codec) | |
468 | continue; | |
469 | avail_slots[0][i] = get_pslots(codec, &rate_table[0][i], &spdif_slots[i]); | |
470 | avail_slots[1][i] = get_cslots(codec); | |
471 | if (!(codec->scaps & AC97_SCAP_INDEP_SDIN)) { | |
472 | for (j = 0; j < i; j++) { | |
473 | if (bus->codec[j]) | |
474 | avail_slots[1][i] &= ~avail_slots[1][j]; | |
475 | } | |
476 | } | |
477 | } | |
478 | /* first step - exclusive devices */ | |
479 | for (i = 0; i < pcms_count; i++) { | |
480 | pcm = &pcms[i]; | |
481 | rpcm = &rpcms[i]; | |
482 | /* low-level driver thinks that it's more clever */ | |
483 | if (pcm->copy_flag) { | |
484 | *rpcm = *pcm; | |
485 | continue; | |
486 | } | |
487 | rpcm->stream = pcm->stream; | |
488 | rpcm->exclusive = pcm->exclusive; | |
489 | rpcm->spdif = pcm->spdif; | |
490 | rpcm->private_value = pcm->private_value; | |
491 | rpcm->bus = bus; | |
492 | rpcm->rates = ~0; | |
493 | slots = pcm->r[0].slots; | |
494 | for (j = 0; j < 4 && slots; j++) { | |
495 | if (!bus->codec[j]) | |
496 | continue; | |
497 | rates = ~0; | |
498 | if (pcm->spdif && pcm->stream == 0) | |
499 | tmp = spdif_slots[j]; | |
500 | else | |
501 | tmp = avail_slots[pcm->stream][j]; | |
502 | if (pcm->exclusive) { | |
503 | /* exclusive access */ | |
504 | tmp &= slots; | |
505 | for (k = 0; k < i; k++) { | |
506 | if (rpcm->stream == rpcms[k].stream) | |
507 | tmp &= ~rpcms[k].r[0].rslots[j]; | |
508 | } | |
509 | } else { | |
510 | /* non-exclusive access */ | |
511 | tmp &= pcm->r[0].slots; | |
512 | } | |
513 | if (tmp) { | |
514 | rpcm->r[0].rslots[j] = tmp; | |
515 | rpcm->r[0].codec[j] = bus->codec[j]; | |
516 | rpcm->r[0].rate_table[j] = rate_table[pcm->stream][j]; | |
517 | if (bus->no_vra) | |
518 | rates = SNDRV_PCM_RATE_48000; | |
519 | else | |
520 | rates = get_rates(rpcm, j, tmp, 0); | |
521 | if (pcm->exclusive) | |
522 | avail_slots[pcm->stream][j] &= ~tmp; | |
523 | } | |
524 | slots &= ~tmp; | |
525 | rpcm->r[0].slots |= tmp; | |
526 | rpcm->rates &= rates; | |
527 | } | |
528 | /* for double rate, we check the first codec only */ | |
529 | if (pcm->stream == SNDRV_PCM_STREAM_PLAYBACK && | |
530 | bus->codec[0] && (bus->codec[0]->flags & AC97_DOUBLE_RATE) && | |
531 | rate_table[pcm->stream][0] == 0) { | |
532 | tmp = (1<<AC97_SLOT_PCM_LEFT) | (1<<AC97_SLOT_PCM_RIGHT) | | |
533 | (1<<AC97_SLOT_PCM_LEFT_0) | (1<<AC97_SLOT_PCM_RIGHT_0); | |
534 | if ((tmp & pcm->r[1].slots) == tmp) { | |
535 | rpcm->r[1].slots = tmp; | |
536 | rpcm->r[1].rslots[0] = tmp; | |
537 | rpcm->r[1].rate_table[0] = 0; | |
538 | rpcm->r[1].codec[0] = bus->codec[0]; | |
539 | if (pcm->exclusive) | |
540 | avail_slots[pcm->stream][0] &= ~tmp; | |
541 | if (bus->no_vra) | |
542 | rates = SNDRV_PCM_RATE_96000; | |
543 | else | |
544 | rates = get_rates(rpcm, 0, tmp, 1); | |
545 | rpcm->rates |= rates; | |
546 | } | |
547 | } | |
548 | if (rpcm->rates == ~0) | |
549 | rpcm->rates = 0; /* not used */ | |
550 | } | |
551 | bus->pcms_count = pcms_count; | |
552 | bus->pcms = rpcms; | |
553 | return 0; | |
554 | } | |
555 | ||
7b09679c TI |
556 | EXPORT_SYMBOL(snd_ac97_pcm_assign); |
557 | ||
1da177e4 LT |
558 | /** |
559 | * snd_ac97_pcm_open - opens the given AC97 pcm | |
560 | * @pcm: the ac97 pcm instance | |
561 | * @rate: rate in Hz, if codec does not support VRA, this value must be 48000Hz | |
562 | * @cfg: output stream characteristics | |
563 | * @slots: a subset of allocated slots (snd_ac97_pcm_assign) for this pcm | |
564 | * | |
565 | * It locks the specified slots and sets the given rate to AC97 registers. | |
566 | */ | |
567 | int snd_ac97_pcm_open(struct ac97_pcm *pcm, unsigned int rate, | |
568 | enum ac97_pcm_cfg cfg, unsigned short slots) | |
569 | { | |
ee42381e | 570 | struct snd_ac97_bus *bus; |
1da177e4 LT |
571 | int i, cidx, r, ok_flag; |
572 | unsigned int reg_ok[4] = {0,0,0,0}; | |
573 | unsigned char reg; | |
574 | int err = 0; | |
575 | ||
576 | r = rate > 48000; | |
577 | bus = pcm->bus; | |
578 | if (cfg == AC97_PCM_CFG_SPDIF) { | |
579 | int err; | |
580 | for (cidx = 0; cidx < 4; cidx++) | |
581 | if (bus->codec[cidx] && (bus->codec[cidx]->ext_id & AC97_EI_SPDIF)) { | |
582 | err = set_spdif_rate(bus->codec[cidx], rate); | |
583 | if (err < 0) | |
584 | return err; | |
585 | } | |
586 | } | |
587 | spin_lock_irq(&pcm->bus->bus_lock); | |
588 | for (i = 3; i < 12; i++) { | |
589 | if (!(slots & (1 << i))) | |
590 | continue; | |
591 | ok_flag = 0; | |
592 | for (cidx = 0; cidx < 4; cidx++) { | |
593 | if (bus->used_slots[pcm->stream][cidx] & (1 << i)) { | |
594 | spin_unlock_irq(&pcm->bus->bus_lock); | |
595 | err = -EBUSY; | |
596 | goto error; | |
597 | } | |
598 | if (pcm->r[r].rslots[cidx] & (1 << i)) { | |
599 | bus->used_slots[pcm->stream][cidx] |= (1 << i); | |
600 | ok_flag++; | |
601 | } | |
602 | } | |
603 | if (!ok_flag) { | |
604 | spin_unlock_irq(&pcm->bus->bus_lock); | |
605 | snd_printk(KERN_ERR "cannot find configuration for AC97 slot %i\n", i); | |
606 | err = -EAGAIN; | |
607 | goto error; | |
608 | } | |
609 | } | |
6dbe6628 | 610 | pcm->cur_dbl = r; |
1da177e4 LT |
611 | spin_unlock_irq(&pcm->bus->bus_lock); |
612 | for (i = 3; i < 12; i++) { | |
613 | if (!(slots & (1 << i))) | |
614 | continue; | |
615 | for (cidx = 0; cidx < 4; cidx++) { | |
616 | if (pcm->r[r].rslots[cidx] & (1 << i)) { | |
617 | reg = get_slot_reg(pcm, cidx, i, r); | |
618 | if (reg == 0xff) { | |
619 | snd_printk(KERN_ERR "invalid AC97 slot %i?\n", i); | |
620 | continue; | |
621 | } | |
622 | if (reg_ok[cidx] & (1 << (reg - AC97_PCM_FRONT_DAC_RATE))) | |
623 | continue; | |
624 | //printk(KERN_DEBUG "setting ac97 reg 0x%x to rate %d\n", reg, rate); | |
625 | err = snd_ac97_set_rate(pcm->r[r].codec[cidx], reg, rate); | |
626 | if (err < 0) | |
627 | snd_printk(KERN_ERR "error in snd_ac97_set_rate: cidx=%d, reg=0x%x, rate=%d, err=%d\n", cidx, reg, rate, err); | |
628 | else | |
629 | reg_ok[cidx] |= (1 << (reg - AC97_PCM_FRONT_DAC_RATE)); | |
630 | } | |
631 | } | |
632 | } | |
633 | pcm->aslots = slots; | |
634 | return 0; | |
635 | ||
636 | error: | |
637 | pcm->aslots = slots; | |
638 | snd_ac97_pcm_close(pcm); | |
639 | return err; | |
640 | } | |
641 | ||
7b09679c TI |
642 | EXPORT_SYMBOL(snd_ac97_pcm_open); |
643 | ||
1da177e4 LT |
644 | /** |
645 | * snd_ac97_pcm_close - closes the given AC97 pcm | |
646 | * @pcm: the ac97 pcm instance | |
647 | * | |
648 | * It frees the locked AC97 slots. | |
649 | */ | |
650 | int snd_ac97_pcm_close(struct ac97_pcm *pcm) | |
651 | { | |
ee42381e | 652 | struct snd_ac97_bus *bus; |
1da177e4 LT |
653 | unsigned short slots = pcm->aslots; |
654 | int i, cidx; | |
655 | ||
6dbe6628 TI |
656 | #ifdef CONFIG_SND_AC97_POWER_SAVE |
657 | int r = pcm->cur_dbl; | |
658 | for (i = 3; i < 12; i++) { | |
659 | if (!(slots & (1 << i))) | |
660 | continue; | |
661 | for (cidx = 0; cidx < 4; cidx++) { | |
662 | if (pcm->r[r].rslots[cidx] & (1 << i)) { | |
663 | int reg = get_slot_reg(pcm, cidx, i, r); | |
664 | snd_ac97_update_power(pcm->r[r].codec[cidx], | |
665 | reg, 0); | |
666 | } | |
667 | } | |
668 | } | |
669 | #endif | |
670 | ||
1da177e4 LT |
671 | bus = pcm->bus; |
672 | spin_lock_irq(&pcm->bus->bus_lock); | |
673 | for (i = 3; i < 12; i++) { | |
674 | if (!(slots & (1 << i))) | |
675 | continue; | |
676 | for (cidx = 0; cidx < 4; cidx++) | |
677 | bus->used_slots[pcm->stream][cidx] &= ~(1 << i); | |
678 | } | |
679 | pcm->aslots = 0; | |
6dbe6628 | 680 | pcm->cur_dbl = 0; |
1da177e4 LT |
681 | spin_unlock_irq(&pcm->bus->bus_lock); |
682 | return 0; | |
683 | } | |
684 | ||
7b09679c TI |
685 | EXPORT_SYMBOL(snd_ac97_pcm_close); |
686 | ||
ee42381e TI |
687 | static int double_rate_hw_constraint_rate(struct snd_pcm_hw_params *params, |
688 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 689 | { |
ee42381e | 690 | struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
1da177e4 | 691 | if (channels->min > 2) { |
ee42381e | 692 | static const struct snd_interval single_rates = { |
1da177e4 LT |
693 | .min = 1, |
694 | .max = 48000, | |
695 | }; | |
ee42381e | 696 | struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
1da177e4 LT |
697 | return snd_interval_refine(rate, &single_rates); |
698 | } | |
699 | return 0; | |
700 | } | |
701 | ||
ee42381e TI |
702 | static int double_rate_hw_constraint_channels(struct snd_pcm_hw_params *params, |
703 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 704 | { |
ee42381e | 705 | struct snd_interval *rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
1da177e4 | 706 | if (rate->min > 48000) { |
ee42381e | 707 | static const struct snd_interval double_rate_channels = { |
1da177e4 LT |
708 | .min = 2, |
709 | .max = 2, | |
710 | }; | |
ee42381e | 711 | struct snd_interval *channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
1da177e4 LT |
712 | return snd_interval_refine(channels, &double_rate_channels); |
713 | } | |
714 | return 0; | |
715 | } | |
716 | ||
717 | /** | |
718 | * snd_ac97_pcm_double_rate_rules - set double rate constraints | |
719 | * @runtime: the runtime of the ac97 front playback pcm | |
720 | * | |
721 | * Installs the hardware constraint rules to prevent using double rates and | |
722 | * more than two channels at the same time. | |
723 | */ | |
ee42381e | 724 | int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime) |
1da177e4 LT |
725 | { |
726 | int err; | |
727 | ||
728 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
729 | double_rate_hw_constraint_rate, NULL, | |
730 | SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
731 | if (err < 0) | |
732 | return err; | |
733 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
734 | double_rate_hw_constraint_channels, NULL, | |
735 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
736 | return err; | |
737 | } | |
7b09679c TI |
738 | |
739 | EXPORT_SYMBOL(snd_ac97_pcm_double_rate_rules); |