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-rw-r--r--sound/isa/sb/sb8_main.c565
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diff --git a/sound/isa/sb/sb8_main.c b/sound/isa/sb/sb8_main.c
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1/*
2 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
3 * Uros Bizjak <uros@kss-loka.si>
4 *
5 * Routines for control of 8-bit SoundBlaster cards and clones
6 * Please note: I don't have access to old SB8 soundcards.
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * --
24 *
25 * Thu Apr 29 20:36:17 BST 1999 George David Morrison <gdm@gedamo.demon.co.uk>
26 * DSP can't respond to commands whilst in "high speed" mode. Caused
27 * glitching during playback. Fixed.
28 *
29 * Wed Jul 12 22:02:55 CEST 2000 Uros Bizjak <uros@kss-loka.si>
30 * Cleaned up and rewrote lowlevel routines.
31 */
32
33#include <sound/driver.h>
34#include <asm/io.h>
35#include <asm/dma.h>
36#include <linux/init.h>
37#include <linux/time.h>
38#include <sound/core.h>
39#include <sound/sb.h>
40
41MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Uros Bizjak <uros@kss-loka.si>");
42MODULE_DESCRIPTION("Routines for control of 8-bit SoundBlaster cards and clones");
43MODULE_LICENSE("GPL");
44
45#define SB8_CLOCK 1000000
46#define SB8_DEN(v) ((SB8_CLOCK + (v) / 2) / (v))
47#define SB8_RATE(v) (SB8_CLOCK / SB8_DEN(v))
48
49static ratnum_t clock = {
50 .num = SB8_CLOCK,
51 .den_min = 1,
52 .den_max = 256,
53 .den_step = 1,
54};
55
56static snd_pcm_hw_constraint_ratnums_t hw_constraints_clock = {
57 .nrats = 1,
58 .rats = &clock,
59};
60
61static ratnum_t stereo_clocks[] = {
62 {
63 .num = SB8_CLOCK,
64 .den_min = SB8_DEN(22050),
65 .den_max = SB8_DEN(22050),
66 .den_step = 1,
67 },
68 {
69 .num = SB8_CLOCK,
70 .den_min = SB8_DEN(11025),
71 .den_max = SB8_DEN(11025),
72 .den_step = 1,
73 }
74};
75
76static int snd_sb8_hw_constraint_rate_channels(snd_pcm_hw_params_t *params,
77 snd_pcm_hw_rule_t *rule)
78{
79 snd_interval_t *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
80 if (c->min > 1) {
81 unsigned int num = 0, den = 0;
82 int err = snd_interval_ratnum(hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE),
83 2, stereo_clocks, &num, &den);
84 if (err >= 0 && den) {
85 params->rate_num = num;
86 params->rate_den = den;
87 }
88 return err;
89 }
90 return 0;
91}
92
93static int snd_sb8_hw_constraint_channels_rate(snd_pcm_hw_params_t *params,
94 snd_pcm_hw_rule_t *rule)
95{
96 snd_interval_t *r = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
97 if (r->min > SB8_RATE(22050) || r->max <= SB8_RATE(11025)) {
98 snd_interval_t t = { .min = 1, .max = 1 };
99 return snd_interval_refine(hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS), &t);
100 }
101 return 0;
102}
103
104static int snd_sb8_playback_prepare(snd_pcm_substream_t * substream)
105{
106 unsigned long flags;
107 sb_t *chip = snd_pcm_substream_chip(substream);
108 snd_pcm_runtime_t *runtime = substream->runtime;
109 unsigned int mixreg, rate, size, count;
110
111 rate = runtime->rate;
112 switch (chip->hardware) {
113 case SB_HW_PRO:
114 if (runtime->channels > 1) {
115 snd_assert(rate == SB8_RATE(11025) || rate == SB8_RATE(22050), return -EINVAL);
116 chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
117 break;
118 }
119 /* fallthru */
120 case SB_HW_201:
121 if (rate > 23000) {
122 chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
123 break;
124 }
125 /* fallthru */
126 case SB_HW_20:
127 chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
128 break;
129 case SB_HW_10:
130 chip->playback_format = SB_DSP_OUTPUT;
131 break;
132 default:
133 return -EINVAL;
134 }
135 size = chip->p_dma_size = snd_pcm_lib_buffer_bytes(substream);
136 count = chip->p_period_size = snd_pcm_lib_period_bytes(substream);
137 spin_lock_irqsave(&chip->reg_lock, flags);
138 snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON);
139 if (runtime->channels > 1) {
140 /* set playback stereo mode */
141 spin_lock(&chip->mixer_lock);
142 mixreg = snd_sbmixer_read(chip, SB_DSP_STEREO_SW);
143 snd_sbmixer_write(chip, SB_DSP_STEREO_SW, mixreg | 0x02);
144 spin_unlock(&chip->mixer_lock);
145
146 /* Soundblaster hardware programming reference guide, 3-23 */
147 snd_sbdsp_command(chip, SB_DSP_DMA8_EXIT);
148 runtime->dma_area[0] = 0x80;
149 snd_dma_program(chip->dma8, runtime->dma_addr, 1, DMA_MODE_WRITE);
150 /* force interrupt */
151 chip->mode = SB_MODE_HALT;
152 snd_sbdsp_command(chip, SB_DSP_OUTPUT);
153 snd_sbdsp_command(chip, 0);
154 snd_sbdsp_command(chip, 0);
155 }
156 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
157 if (runtime->channels > 1) {
158 snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
159 spin_lock(&chip->mixer_lock);
160 /* save output filter status and turn it off */
161 mixreg = snd_sbmixer_read(chip, SB_DSP_PLAYBACK_FILT);
162 snd_sbmixer_write(chip, SB_DSP_PLAYBACK_FILT, mixreg | 0x20);
163 spin_unlock(&chip->mixer_lock);
164 /* just use force_mode16 for temporary storate... */
165 chip->force_mode16 = mixreg;
166 } else {
167 snd_sbdsp_command(chip, 256 - runtime->rate_den);
168 }
169 if (chip->playback_format != SB_DSP_OUTPUT) {
170 count--;
171 snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
172 snd_sbdsp_command(chip, count & 0xff);
173 snd_sbdsp_command(chip, count >> 8);
174 }
175 spin_unlock_irqrestore(&chip->reg_lock, flags);
176 snd_dma_program(chip->dma8, runtime->dma_addr,
177 size, DMA_MODE_WRITE | DMA_AUTOINIT);
178 return 0;
179}
180
181static int snd_sb8_playback_trigger(snd_pcm_substream_t * substream,
182 int cmd)
183{
184 unsigned long flags;
185 sb_t *chip = snd_pcm_substream_chip(substream);
186 unsigned int count;
187
188 spin_lock_irqsave(&chip->reg_lock, flags);
189 switch (cmd) {
190 case SNDRV_PCM_TRIGGER_START:
191 snd_sbdsp_command(chip, chip->playback_format);
192 if (chip->playback_format == SB_DSP_OUTPUT) {
193 count = chip->p_period_size - 1;
194 snd_sbdsp_command(chip, count & 0xff);
195 snd_sbdsp_command(chip, count >> 8);
196 }
197 break;
198 case SNDRV_PCM_TRIGGER_STOP:
199 if (chip->playback_format == SB_DSP_HI_OUTPUT_AUTO) {
200 snd_pcm_runtime_t *runtime = substream->runtime;
201 snd_sbdsp_reset(chip);
202 if (runtime->channels > 1) {
203 spin_lock(&chip->mixer_lock);
204 /* restore output filter and set hardware to mono mode */
205 snd_sbmixer_write(chip, SB_DSP_STEREO_SW, chip->force_mode16 & ~0x02);
206 spin_unlock(&chip->mixer_lock);
207 }
208 } else {
209 snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
210 }
211 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
212 }
213 spin_unlock_irqrestore(&chip->reg_lock, flags);
214 chip->mode = (cmd == SNDRV_PCM_TRIGGER_START) ? SB_MODE_PLAYBACK_8 : SB_MODE_HALT;
215 return 0;
216}
217
218static int snd_sb8_hw_params(snd_pcm_substream_t * substream,
219 snd_pcm_hw_params_t * hw_params)
220{
221 return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
222}
223
224static int snd_sb8_hw_free(snd_pcm_substream_t * substream)
225{
226 snd_pcm_lib_free_pages(substream);
227 return 0;
228}
229
230static int snd_sb8_capture_prepare(snd_pcm_substream_t * substream)
231{
232 unsigned long flags;
233 sb_t *chip = snd_pcm_substream_chip(substream);
234 snd_pcm_runtime_t *runtime = substream->runtime;
235 unsigned int mixreg, rate, size, count;
236
237 rate = runtime->rate;
238 switch (chip->hardware) {
239 case SB_HW_PRO:
240 if (runtime->channels > 1) {
241 snd_assert(rate == SB8_RATE(11025) || rate == SB8_RATE(22050), return -EINVAL);
242 chip->capture_format = SB_DSP_HI_INPUT_AUTO;
243 break;
244 }
245 chip->capture_format = (rate > 23000) ? SB_DSP_HI_INPUT_AUTO : SB_DSP_LO_INPUT_AUTO;
246 break;
247 case SB_HW_201:
248 if (rate > 13000) {
249 chip->capture_format = SB_DSP_HI_INPUT_AUTO;
250 break;
251 }
252 /* fallthru */
253 case SB_HW_20:
254 chip->capture_format = SB_DSP_LO_INPUT_AUTO;
255 break;
256 case SB_HW_10:
257 chip->capture_format = SB_DSP_INPUT;
258 break;
259 default:
260 return -EINVAL;
261 }
262 size = chip->c_dma_size = snd_pcm_lib_buffer_bytes(substream);
263 count = chip->c_period_size = snd_pcm_lib_period_bytes(substream);
264 spin_lock_irqsave(&chip->reg_lock, flags);
265 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
266 if (runtime->channels > 1)
267 snd_sbdsp_command(chip, SB_DSP_STEREO_8BIT);
268 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
269 if (runtime->channels > 1) {
270 snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
271 spin_lock(&chip->mixer_lock);
272 /* save input filter status and turn it off */
273 mixreg = snd_sbmixer_read(chip, SB_DSP_CAPTURE_FILT);
274 snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, mixreg | 0x20);
275 spin_unlock(&chip->mixer_lock);
276 /* just use force_mode16 for temporary storate... */
277 chip->force_mode16 = mixreg;
278 } else {
279 snd_sbdsp_command(chip, 256 - runtime->rate_den);
280 }
281 if (chip->capture_format != SB_DSP_OUTPUT) {
282 count--;
283 snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
284 snd_sbdsp_command(chip, count & 0xff);
285 snd_sbdsp_command(chip, count >> 8);
286 }
287 spin_unlock_irqrestore(&chip->reg_lock, flags);
288 snd_dma_program(chip->dma8, runtime->dma_addr,
289 size, DMA_MODE_READ | DMA_AUTOINIT);
290 return 0;
291}
292
293static int snd_sb8_capture_trigger(snd_pcm_substream_t * substream,
294 int cmd)
295{
296 unsigned long flags;
297 sb_t *chip = snd_pcm_substream_chip(substream);
298 unsigned int count;
299
300 spin_lock_irqsave(&chip->reg_lock, flags);
301 switch (cmd) {
302 case SNDRV_PCM_TRIGGER_START:
303 snd_sbdsp_command(chip, chip->capture_format);
304 if (chip->capture_format == SB_DSP_INPUT) {
305 count = chip->c_period_size - 1;
306 snd_sbdsp_command(chip, count & 0xff);
307 snd_sbdsp_command(chip, count >> 8);
308 }
309 break;
310 case SNDRV_PCM_TRIGGER_STOP:
311 if (chip->capture_format == SB_DSP_HI_INPUT_AUTO) {
312 snd_pcm_runtime_t *runtime = substream->runtime;
313 snd_sbdsp_reset(chip);
314 if (runtime->channels > 1) {
315 /* restore input filter status */
316 spin_lock(&chip->mixer_lock);
317 snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, chip->force_mode16);
318 spin_unlock(&chip->mixer_lock);
319 /* set hardware to mono mode */
320 snd_sbdsp_command(chip, SB_DSP_MONO_8BIT);
321 }
322 } else {
323 snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
324 }
325 snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
326 }
327 spin_unlock_irqrestore(&chip->reg_lock, flags);
328 chip->mode = (cmd == SNDRV_PCM_TRIGGER_START) ? SB_MODE_CAPTURE_8 : SB_MODE_HALT;
329 return 0;
330}
331
332irqreturn_t snd_sb8dsp_interrupt(sb_t *chip)
333{
334 snd_pcm_substream_t *substream;
335 snd_pcm_runtime_t *runtime;
336
337#if 0
338 snd_printk("sb8: interrupt\n");
339#endif
340 snd_sb_ack_8bit(chip);
341 switch (chip->mode) {
342 case SB_MODE_PLAYBACK_8: /* ok.. playback is active */
343 substream = chip->playback_substream;
344 runtime = substream->runtime;
345 if (chip->playback_format == SB_DSP_OUTPUT)
346 snd_sb8_playback_trigger(substream, SNDRV_PCM_TRIGGER_START);
347 snd_pcm_period_elapsed(substream);
348 break;
349 case SB_MODE_CAPTURE_8:
350 substream = chip->capture_substream;
351 runtime = substream->runtime;
352 if (chip->capture_format == SB_DSP_INPUT)
353 snd_sb8_capture_trigger(substream, SNDRV_PCM_TRIGGER_START);
354 snd_pcm_period_elapsed(substream);
355 break;
356 }
357 return IRQ_HANDLED;
358}
359
360static snd_pcm_uframes_t snd_sb8_playback_pointer(snd_pcm_substream_t * substream)
361{
362 sb_t *chip = snd_pcm_substream_chip(substream);
363 size_t ptr;
364
365 if (chip->mode != SB_MODE_PLAYBACK_8)
366 return 0;
367 ptr = snd_dma_pointer(chip->dma8, chip->p_dma_size);
368 return bytes_to_frames(substream->runtime, ptr);
369}
370
371static snd_pcm_uframes_t snd_sb8_capture_pointer(snd_pcm_substream_t * substream)
372{
373 sb_t *chip = snd_pcm_substream_chip(substream);
374 size_t ptr;
375
376 if (chip->mode != SB_MODE_CAPTURE_8)
377 return 0;
378 ptr = snd_dma_pointer(chip->dma8, chip->c_dma_size);
379 return bytes_to_frames(substream->runtime, ptr);
380}
381
382/*
383
384 */
385
386static snd_pcm_hardware_t snd_sb8_playback =
387{
388 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
389 SNDRV_PCM_INFO_MMAP_VALID),
390 .formats = SNDRV_PCM_FMTBIT_U8,
391 .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
392 SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_22050),
393 .rate_min = 4000,
394 .rate_max = 23000,
395 .channels_min = 1,
396 .channels_max = 1,
397 .buffer_bytes_max = 65536,
398 .period_bytes_min = 64,
399 .period_bytes_max = 65536,
400 .periods_min = 1,
401 .periods_max = 1024,
402 .fifo_size = 0,
403};
404
405static snd_pcm_hardware_t snd_sb8_capture =
406{
407 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
408 SNDRV_PCM_INFO_MMAP_VALID),
409 .formats = SNDRV_PCM_FMTBIT_U8,
410 .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
411 SNDRV_PCM_RATE_11025),
412 .rate_min = 4000,
413 .rate_max = 13000,
414 .channels_min = 1,
415 .channels_max = 1,
416 .buffer_bytes_max = 65536,
417 .period_bytes_min = 64,
418 .period_bytes_max = 65536,
419 .periods_min = 1,
420 .periods_max = 1024,
421 .fifo_size = 0,
422};
423
424/*
425 *
426 */
427
428static int snd_sb8_open(snd_pcm_substream_t *substream)
429{
430 sb_t *chip = snd_pcm_substream_chip(substream);
431 snd_pcm_runtime_t *runtime = substream->runtime;
432 unsigned long flags;
433
434 spin_lock_irqsave(&chip->open_lock, flags);
435 if (chip->open) {
436 spin_unlock_irqrestore(&chip->open_lock, flags);
437 return -EAGAIN;
438 }
439 chip->open |= SB_OPEN_PCM;
440 spin_unlock_irqrestore(&chip->open_lock, flags);
441 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
442 chip->playback_substream = substream;
443 runtime->hw = snd_sb8_playback;
444 } else {
445 chip->capture_substream = substream;
446 runtime->hw = snd_sb8_capture;
447 }
448 switch (chip->hardware) {
449 case SB_HW_PRO:
450 runtime->hw.rate_max = 44100;
451 runtime->hw.channels_max = 2;
452 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
453 snd_sb8_hw_constraint_rate_channels, NULL,
454 SNDRV_PCM_HW_PARAM_CHANNELS,
455 SNDRV_PCM_HW_PARAM_RATE, -1);
456 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
457 snd_sb8_hw_constraint_channels_rate, NULL,
458 SNDRV_PCM_HW_PARAM_RATE, -1);
459 break;
460 case SB_HW_201:
461 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
462 runtime->hw.rate_max = 44100;
463 } else {
464 runtime->hw.rate_max = 15000;
465 }
466 default:
467 break;
468 }
469 snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
470 &hw_constraints_clock);
471 return 0;
472}
473
474static int snd_sb8_close(snd_pcm_substream_t *substream)
475{
476 unsigned long flags;
477 sb_t *chip = snd_pcm_substream_chip(substream);
478
479 chip->playback_substream = NULL;
480 chip->capture_substream = NULL;
481 spin_lock_irqsave(&chip->open_lock, flags);
482 chip->open &= ~SB_OPEN_PCM;
483 spin_unlock_irqrestore(&chip->open_lock, flags);
484 return 0;
485}
486
487/*
488 * Initialization part
489 */
490
491static snd_pcm_ops_t snd_sb8_playback_ops = {
492 .open = snd_sb8_open,
493 .close = snd_sb8_close,
494 .ioctl = snd_pcm_lib_ioctl,
495 .hw_params = snd_sb8_hw_params,
496 .hw_free = snd_sb8_hw_free,
497 .prepare = snd_sb8_playback_prepare,
498 .trigger = snd_sb8_playback_trigger,
499 .pointer = snd_sb8_playback_pointer,
500};
501
502static snd_pcm_ops_t snd_sb8_capture_ops = {
503 .open = snd_sb8_open,
504 .close = snd_sb8_close,
505 .ioctl = snd_pcm_lib_ioctl,
506 .hw_params = snd_sb8_hw_params,
507 .hw_free = snd_sb8_hw_free,
508 .prepare = snd_sb8_capture_prepare,
509 .trigger = snd_sb8_capture_trigger,
510 .pointer = snd_sb8_capture_pointer,
511};
512
513static void snd_sb8dsp_pcm_free(snd_pcm_t *pcm)
514{
515 snd_pcm_lib_preallocate_free_for_all(pcm);
516}
517
518int snd_sb8dsp_pcm(sb_t *chip, int device, snd_pcm_t ** rpcm)
519{
520 snd_card_t *card = chip->card;
521 snd_pcm_t *pcm;
522 int err;
523
524 if (rpcm)
525 *rpcm = NULL;
526 if ((err = snd_pcm_new(card, "SB8 DSP", device, 1, 1, &pcm)) < 0)
527 return err;
528 sprintf(pcm->name, "DSP v%i.%i", chip->version >> 8, chip->version & 0xff);
529 pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
530 pcm->private_data = chip;
531 pcm->private_free = snd_sb8dsp_pcm_free;
532
533 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sb8_playback_ops);
534 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sb8_capture_ops);
535
536 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
537 snd_dma_isa_data(),
538 64*1024, 64*1024);
539
540 if (rpcm)
541 *rpcm = pcm;
542 return 0;
543}
544
545EXPORT_SYMBOL(snd_sb8dsp_pcm);
546EXPORT_SYMBOL(snd_sb8dsp_interrupt);
547 /* sb8_midi.c */
548EXPORT_SYMBOL(snd_sb8dsp_midi_interrupt);
549EXPORT_SYMBOL(snd_sb8dsp_midi);
550
551/*
552 * INIT part
553 */
554
555static int __init alsa_sb8_init(void)
556{
557 return 0;
558}
559
560static void __exit alsa_sb8_exit(void)
561{
562}
563
564module_init(alsa_sb8_init)
565module_exit(alsa_sb8_exit)
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