x86, rwsem: Minor cleanups
[sfrench/cifs-2.6.git] / sound / isa / sb / sb16_main.c
1 /*
2  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
3  *  Routines for control of 16-bit SoundBlaster cards and clones
4  *  Note: This is very ugly hardware which uses one 8-bit DMA channel and
5  *        second 16-bit DMA channel. Unfortunately 8-bit DMA channel can't
6  *        transfer 16-bit samples and 16-bit DMA channels can't transfer
7  *        8-bit samples. This make full duplex more complicated than
8  *        can be... People, don't buy these soundcards for full 16-bit
9  *        duplex!!!
10  *  Note: 16-bit wide is assigned to first direction which made request.
11  *        With full duplex - playback is preferred with abstract layer.
12  *
13  *  Note: Some chip revisions have hardware bug. Changing capture
14  *        channel from full-duplex 8bit DMA to 16bit DMA will block
15  *        16bit DMA transfers from DSP chip (capture) until 8bit transfer
16  *        to DSP chip (playback) starts. This bug can be avoided with
17  *        "16bit DMA Allocation" setting set to Playback or Capture.
18  *
19  *
20  *   This program is free software; you can redistribute it and/or modify
21  *   it under the terms of the GNU General Public License as published by
22  *   the Free Software Foundation; either version 2 of the License, or
23  *   (at your option) any later version.
24  *
25  *   This program is distributed in the hope that it will be useful,
26  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
27  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
28  *   GNU General Public License for more details.
29  *
30  *   You should have received a copy of the GNU General Public License
31  *   along with this program; if not, write to the Free Software
32  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
33  *
34  */
35
36 #include <asm/io.h>
37 #include <asm/dma.h>
38 #include <linux/init.h>
39 #include <linux/time.h>
40 #include <sound/core.h>
41 #include <sound/sb.h>
42 #include <sound/sb16_csp.h>
43 #include <sound/mpu401.h>
44 #include <sound/control.h>
45 #include <sound/info.h>
46
47 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
48 MODULE_DESCRIPTION("Routines for control of 16-bit SoundBlaster cards and clones");
49 MODULE_LICENSE("GPL");
50
51 #ifdef CONFIG_SND_SB16_CSP
52 static void snd_sb16_csp_playback_prepare(struct snd_sb *chip, struct snd_pcm_runtime *runtime)
53 {
54         if (chip->hardware == SB_HW_16CSP) {
55                 struct snd_sb_csp *csp = chip->csp;
56
57                 if (csp->running & SNDRV_SB_CSP_ST_LOADED) {
58                         /* manually loaded codec */
59                         if ((csp->mode & SNDRV_SB_CSP_MODE_DSP_WRITE) &&
60                             ((1U << runtime->format) == csp->acc_format)) {
61                                 /* Supported runtime PCM format for playback */
62                                 if (csp->ops.csp_use(csp) == 0) {
63                                         /* If CSP was successfully acquired */
64                                         goto __start_CSP;
65                                 }
66                         } else if ((csp->mode & SNDRV_SB_CSP_MODE_QSOUND) && (csp->q_enabled)) {
67                                 /* QSound decoder is loaded and enabled */
68                                 if ((1 << runtime->format) & (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
69                                                               SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE)) {
70                                         /* Only for simple PCM formats */
71                                         if (csp->ops.csp_use(csp) == 0) {
72                                                 /* If CSP was successfully acquired */
73                                                 goto __start_CSP;
74                                         }
75                                 }
76                         }
77                 } else if (csp->ops.csp_use(csp) == 0) {
78                         /* Acquire CSP and try to autoload hardware codec */
79                         if (csp->ops.csp_autoload(csp, runtime->format, SNDRV_SB_CSP_MODE_DSP_WRITE)) {
80                                 /* Unsupported format, release CSP */
81                                 csp->ops.csp_unuse(csp);
82                         } else {
83                       __start_CSP:
84                                 /* Try to start CSP */
85                                 if (csp->ops.csp_start(csp, (chip->mode & SB_MODE_PLAYBACK_16) ?
86                                                        SNDRV_SB_CSP_SAMPLE_16BIT : SNDRV_SB_CSP_SAMPLE_8BIT,
87                                                        (runtime->channels > 1) ?
88                                                        SNDRV_SB_CSP_STEREO : SNDRV_SB_CSP_MONO)) {
89                                         /* Failed, release CSP */
90                                         csp->ops.csp_unuse(csp);
91                                 } else {
92                                         /* Success, CSP acquired and running */
93                                         chip->open = SNDRV_SB_CSP_MODE_DSP_WRITE;
94                                 }
95                         }
96                 }
97         }
98 }
99
100 static void snd_sb16_csp_capture_prepare(struct snd_sb *chip, struct snd_pcm_runtime *runtime)
101 {
102         if (chip->hardware == SB_HW_16CSP) {
103                 struct snd_sb_csp *csp = chip->csp;
104
105                 if (csp->running & SNDRV_SB_CSP_ST_LOADED) {
106                         /* manually loaded codec */
107                         if ((csp->mode & SNDRV_SB_CSP_MODE_DSP_READ) &&
108                             ((1U << runtime->format) == csp->acc_format)) {
109                                 /* Supported runtime PCM format for capture */
110                                 if (csp->ops.csp_use(csp) == 0) {
111                                         /* If CSP was successfully acquired */
112                                         goto __start_CSP;
113                                 }
114                         }
115                 } else if (csp->ops.csp_use(csp) == 0) {
116                         /* Acquire CSP and try to autoload hardware codec */
117                         if (csp->ops.csp_autoload(csp, runtime->format, SNDRV_SB_CSP_MODE_DSP_READ)) {
118                                 /* Unsupported format, release CSP */
119                                 csp->ops.csp_unuse(csp);
120                         } else {
121                       __start_CSP:
122                                 /* Try to start CSP */
123                                 if (csp->ops.csp_start(csp, (chip->mode & SB_MODE_CAPTURE_16) ?
124                                                        SNDRV_SB_CSP_SAMPLE_16BIT : SNDRV_SB_CSP_SAMPLE_8BIT,
125                                                        (runtime->channels > 1) ?
126                                                        SNDRV_SB_CSP_STEREO : SNDRV_SB_CSP_MONO)) {
127                                         /* Failed, release CSP */
128                                         csp->ops.csp_unuse(csp);
129                                 } else {
130                                         /* Success, CSP acquired and running */
131                                         chip->open = SNDRV_SB_CSP_MODE_DSP_READ;
132                                 }
133                         }
134                 }
135         }
136 }
137
138 static void snd_sb16_csp_update(struct snd_sb *chip)
139 {
140         if (chip->hardware == SB_HW_16CSP) {
141                 struct snd_sb_csp *csp = chip->csp;
142
143                 if (csp->qpos_changed) {
144                         spin_lock(&chip->reg_lock);
145                         csp->ops.csp_qsound_transfer (csp);
146                         spin_unlock(&chip->reg_lock);
147                 }
148         }
149 }
150
151 static void snd_sb16_csp_playback_open(struct snd_sb *chip, struct snd_pcm_runtime *runtime)
152 {
153         /* CSP decoders (QSound excluded) support only 16bit transfers */
154         if (chip->hardware == SB_HW_16CSP) {
155                 struct snd_sb_csp *csp = chip->csp;
156
157                 if (csp->running & SNDRV_SB_CSP_ST_LOADED) {
158                         /* manually loaded codec */
159                         if (csp->mode & SNDRV_SB_CSP_MODE_DSP_WRITE) {
160                                 runtime->hw.formats |= csp->acc_format;
161                         }
162                 } else {
163                         /* autoloaded codecs */
164                         runtime->hw.formats |= SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW |
165                                                SNDRV_PCM_FMTBIT_IMA_ADPCM;
166                 }
167         }
168 }
169
170 static void snd_sb16_csp_playback_close(struct snd_sb *chip)
171 {
172         if ((chip->hardware == SB_HW_16CSP) && (chip->open == SNDRV_SB_CSP_MODE_DSP_WRITE)) {
173                 struct snd_sb_csp *csp = chip->csp;
174
175                 if (csp->ops.csp_stop(csp) == 0) {
176                         csp->ops.csp_unuse(csp);
177                         chip->open = 0;
178                 }
179         }
180 }
181
182 static void snd_sb16_csp_capture_open(struct snd_sb *chip, struct snd_pcm_runtime *runtime)
183 {
184         /* CSP coders support only 16bit transfers */
185         if (chip->hardware == SB_HW_16CSP) {
186                 struct snd_sb_csp *csp = chip->csp;
187
188                 if (csp->running & SNDRV_SB_CSP_ST_LOADED) {
189                         /* manually loaded codec */
190                         if (csp->mode & SNDRV_SB_CSP_MODE_DSP_READ) {
191                                 runtime->hw.formats |= csp->acc_format;
192                         }
193                 } else {
194                         /* autoloaded codecs */
195                         runtime->hw.formats |= SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW |
196                                                SNDRV_PCM_FMTBIT_IMA_ADPCM;
197                 }
198         }
199 }
200
201 static void snd_sb16_csp_capture_close(struct snd_sb *chip)
202 {
203         if ((chip->hardware == SB_HW_16CSP) && (chip->open == SNDRV_SB_CSP_MODE_DSP_READ)) {
204                 struct snd_sb_csp *csp = chip->csp;
205
206                 if (csp->ops.csp_stop(csp) == 0) {
207                         csp->ops.csp_unuse(csp);
208                         chip->open = 0;
209                 }
210         }
211 }
212 #else
213 #define snd_sb16_csp_playback_prepare(chip, runtime)    /*nop*/
214 #define snd_sb16_csp_capture_prepare(chip, runtime)     /*nop*/
215 #define snd_sb16_csp_update(chip)                       /*nop*/
216 #define snd_sb16_csp_playback_open(chip, runtime)       /*nop*/
217 #define snd_sb16_csp_playback_close(chip)               /*nop*/
218 #define snd_sb16_csp_capture_open(chip, runtime)        /*nop*/
219 #define snd_sb16_csp_capture_close(chip)                /*nop*/
220 #endif
221
222
223 static void snd_sb16_setup_rate(struct snd_sb *chip,
224                                 unsigned short rate,
225                                 int channel)
226 {
227         unsigned long flags;
228
229         spin_lock_irqsave(&chip->reg_lock, flags);
230         if (chip->mode & (channel == SNDRV_PCM_STREAM_PLAYBACK ? SB_MODE_PLAYBACK_16 : SB_MODE_CAPTURE_16))
231                 snd_sb_ack_16bit(chip);
232         else
233                 snd_sb_ack_8bit(chip);
234         if (!(chip->mode & SB_RATE_LOCK)) {
235                 chip->locked_rate = rate;
236                 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE_IN);
237                 snd_sbdsp_command(chip, rate >> 8);
238                 snd_sbdsp_command(chip, rate & 0xff);
239                 snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE_OUT);
240                 snd_sbdsp_command(chip, rate >> 8);
241                 snd_sbdsp_command(chip, rate & 0xff);
242         }
243         spin_unlock_irqrestore(&chip->reg_lock, flags);
244 }
245
246 static int snd_sb16_hw_params(struct snd_pcm_substream *substream,
247                               struct snd_pcm_hw_params *hw_params)
248 {
249         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
250 }
251
252 static int snd_sb16_hw_free(struct snd_pcm_substream *substream)
253 {
254         snd_pcm_lib_free_pages(substream);
255         return 0;
256 }
257
258 static int snd_sb16_playback_prepare(struct snd_pcm_substream *substream)
259 {
260         unsigned long flags;
261         struct snd_sb *chip = snd_pcm_substream_chip(substream);
262         struct snd_pcm_runtime *runtime = substream->runtime;
263         unsigned char format;
264         unsigned int size, count, dma;
265
266         snd_sb16_csp_playback_prepare(chip, runtime);
267         if (snd_pcm_format_unsigned(runtime->format) > 0) {
268                 format = runtime->channels > 1 ? SB_DSP4_MODE_UNS_STEREO : SB_DSP4_MODE_UNS_MONO;
269         } else {
270                 format = runtime->channels > 1 ? SB_DSP4_MODE_SIGN_STEREO : SB_DSP4_MODE_SIGN_MONO;
271         }
272
273         snd_sb16_setup_rate(chip, runtime->rate, SNDRV_PCM_STREAM_PLAYBACK);
274         size = chip->p_dma_size = snd_pcm_lib_buffer_bytes(substream);
275         dma = (chip->mode & SB_MODE_PLAYBACK_8) ? chip->dma8 : chip->dma16;
276         snd_dma_program(dma, runtime->dma_addr, size, DMA_MODE_WRITE | DMA_AUTOINIT);
277
278         count = snd_pcm_lib_period_bytes(substream);
279         spin_lock_irqsave(&chip->reg_lock, flags);
280         if (chip->mode & SB_MODE_PLAYBACK_16) {
281                 count >>= 1;
282                 count--;
283                 snd_sbdsp_command(chip, SB_DSP4_OUT16_AI);
284                 snd_sbdsp_command(chip, format);
285                 snd_sbdsp_command(chip, count & 0xff);
286                 snd_sbdsp_command(chip, count >> 8);
287                 snd_sbdsp_command(chip, SB_DSP_DMA16_OFF);
288         } else {
289                 count--;
290                 snd_sbdsp_command(chip, SB_DSP4_OUT8_AI);
291                 snd_sbdsp_command(chip, format);
292                 snd_sbdsp_command(chip, count & 0xff);
293                 snd_sbdsp_command(chip, count >> 8);
294                 snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
295         }
296         spin_unlock_irqrestore(&chip->reg_lock, flags);
297         return 0;
298 }
299
300 static int snd_sb16_playback_trigger(struct snd_pcm_substream *substream,
301                                      int cmd)
302 {
303         struct snd_sb *chip = snd_pcm_substream_chip(substream);
304         int result = 0;
305
306         spin_lock(&chip->reg_lock);
307         switch (cmd) {
308         case SNDRV_PCM_TRIGGER_START:
309         case SNDRV_PCM_TRIGGER_RESUME:
310                 chip->mode |= SB_RATE_LOCK_PLAYBACK;
311                 snd_sbdsp_command(chip, chip->mode & SB_MODE_PLAYBACK_16 ? SB_DSP_DMA16_ON : SB_DSP_DMA8_ON);
312                 break;
313         case SNDRV_PCM_TRIGGER_STOP:
314         case SNDRV_PCM_TRIGGER_SUSPEND:
315                 snd_sbdsp_command(chip, chip->mode & SB_MODE_PLAYBACK_16 ? SB_DSP_DMA16_OFF : SB_DSP_DMA8_OFF);
316                 /* next two lines are needed for some types of DSP4 (SB AWE 32 - 4.13) */
317                 if (chip->mode & SB_RATE_LOCK_CAPTURE)
318                         snd_sbdsp_command(chip, chip->mode & SB_MODE_CAPTURE_16 ? SB_DSP_DMA16_ON : SB_DSP_DMA8_ON);
319                 chip->mode &= ~SB_RATE_LOCK_PLAYBACK;
320                 break;
321         default:
322                 result = -EINVAL;
323         }
324         spin_unlock(&chip->reg_lock);
325         return result;
326 }
327
328 static int snd_sb16_capture_prepare(struct snd_pcm_substream *substream)
329 {
330         unsigned long flags;
331         struct snd_sb *chip = snd_pcm_substream_chip(substream);
332         struct snd_pcm_runtime *runtime = substream->runtime;
333         unsigned char format;
334         unsigned int size, count, dma;
335
336         snd_sb16_csp_capture_prepare(chip, runtime);
337         if (snd_pcm_format_unsigned(runtime->format) > 0) {
338                 format = runtime->channels > 1 ? SB_DSP4_MODE_UNS_STEREO : SB_DSP4_MODE_UNS_MONO;
339         } else {
340                 format = runtime->channels > 1 ? SB_DSP4_MODE_SIGN_STEREO : SB_DSP4_MODE_SIGN_MONO;
341         }
342         snd_sb16_setup_rate(chip, runtime->rate, SNDRV_PCM_STREAM_CAPTURE);
343         size = chip->c_dma_size = snd_pcm_lib_buffer_bytes(substream);
344         dma = (chip->mode & SB_MODE_CAPTURE_8) ? chip->dma8 : chip->dma16;
345         snd_dma_program(dma, runtime->dma_addr, size, DMA_MODE_READ | DMA_AUTOINIT);
346
347         count = snd_pcm_lib_period_bytes(substream);
348         spin_lock_irqsave(&chip->reg_lock, flags);
349         if (chip->mode & SB_MODE_CAPTURE_16) {
350                 count >>= 1;
351                 count--;
352                 snd_sbdsp_command(chip, SB_DSP4_IN16_AI);
353                 snd_sbdsp_command(chip, format);
354                 snd_sbdsp_command(chip, count & 0xff);
355                 snd_sbdsp_command(chip, count >> 8);
356                 snd_sbdsp_command(chip, SB_DSP_DMA16_OFF);
357         } else {
358                 count--;
359                 snd_sbdsp_command(chip, SB_DSP4_IN8_AI);
360                 snd_sbdsp_command(chip, format);
361                 snd_sbdsp_command(chip, count & 0xff);
362                 snd_sbdsp_command(chip, count >> 8);
363                 snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
364         }
365         spin_unlock_irqrestore(&chip->reg_lock, flags);
366         return 0;
367 }
368
369 static int snd_sb16_capture_trigger(struct snd_pcm_substream *substream,
370                                     int cmd)
371 {
372         struct snd_sb *chip = snd_pcm_substream_chip(substream);
373         int result = 0;
374
375         spin_lock(&chip->reg_lock);
376         switch (cmd) {
377         case SNDRV_PCM_TRIGGER_START:
378         case SNDRV_PCM_TRIGGER_RESUME:
379                 chip->mode |= SB_RATE_LOCK_CAPTURE;
380                 snd_sbdsp_command(chip, chip->mode & SB_MODE_CAPTURE_16 ? SB_DSP_DMA16_ON : SB_DSP_DMA8_ON);
381                 break;
382         case SNDRV_PCM_TRIGGER_STOP:
383         case SNDRV_PCM_TRIGGER_SUSPEND:
384                 snd_sbdsp_command(chip, chip->mode & SB_MODE_CAPTURE_16 ? SB_DSP_DMA16_OFF : SB_DSP_DMA8_OFF);
385                 /* next two lines are needed for some types of DSP4 (SB AWE 32 - 4.13) */
386                 if (chip->mode & SB_RATE_LOCK_PLAYBACK)
387                         snd_sbdsp_command(chip, chip->mode & SB_MODE_PLAYBACK_16 ? SB_DSP_DMA16_ON : SB_DSP_DMA8_ON);
388                 chip->mode &= ~SB_RATE_LOCK_CAPTURE;
389                 break;
390         default:
391                 result = -EINVAL;
392         }
393         spin_unlock(&chip->reg_lock);
394         return result;
395 }
396
397 irqreturn_t snd_sb16dsp_interrupt(int irq, void *dev_id)
398 {
399         struct snd_sb *chip = dev_id;
400         unsigned char status;
401         int ok;
402
403         spin_lock(&chip->mixer_lock);
404         status = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);
405         spin_unlock(&chip->mixer_lock);
406         if ((status & SB_IRQTYPE_MPUIN) && chip->rmidi_callback)
407                 chip->rmidi_callback(irq, chip->rmidi->private_data);
408         if (status & SB_IRQTYPE_8BIT) {
409                 ok = 0;
410                 if (chip->mode & SB_MODE_PLAYBACK_8) {
411                         snd_pcm_period_elapsed(chip->playback_substream);
412                         snd_sb16_csp_update(chip);
413                         ok++;
414                 }
415                 if (chip->mode & SB_MODE_CAPTURE_8) {
416                         snd_pcm_period_elapsed(chip->capture_substream);
417                         ok++;
418                 }
419                 spin_lock(&chip->reg_lock);
420                 if (!ok)
421                         snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
422                 snd_sb_ack_8bit(chip);
423                 spin_unlock(&chip->reg_lock);
424         }
425         if (status & SB_IRQTYPE_16BIT) {
426                 ok = 0;
427                 if (chip->mode & SB_MODE_PLAYBACK_16) {
428                         snd_pcm_period_elapsed(chip->playback_substream);
429                         snd_sb16_csp_update(chip);
430                         ok++;
431                 }
432                 if (chip->mode & SB_MODE_CAPTURE_16) {
433                         snd_pcm_period_elapsed(chip->capture_substream);
434                         ok++;
435                 }
436                 spin_lock(&chip->reg_lock);
437                 if (!ok)
438                         snd_sbdsp_command(chip, SB_DSP_DMA16_OFF);
439                 snd_sb_ack_16bit(chip);
440                 spin_unlock(&chip->reg_lock);
441         }
442         return IRQ_HANDLED;
443 }
444
445 /*
446
447  */
448
449 static snd_pcm_uframes_t snd_sb16_playback_pointer(struct snd_pcm_substream *substream)
450 {
451         struct snd_sb *chip = snd_pcm_substream_chip(substream);
452         unsigned int dma;
453         size_t ptr;
454
455         dma = (chip->mode & SB_MODE_PLAYBACK_8) ? chip->dma8 : chip->dma16;
456         ptr = snd_dma_pointer(dma, chip->p_dma_size);
457         return bytes_to_frames(substream->runtime, ptr);
458 }
459
460 static snd_pcm_uframes_t snd_sb16_capture_pointer(struct snd_pcm_substream *substream)
461 {
462         struct snd_sb *chip = snd_pcm_substream_chip(substream);
463         unsigned int dma;
464         size_t ptr;
465
466         dma = (chip->mode & SB_MODE_CAPTURE_8) ? chip->dma8 : chip->dma16;
467         ptr = snd_dma_pointer(dma, chip->c_dma_size);
468         return bytes_to_frames(substream->runtime, ptr);
469 }
470
471 /*
472
473  */
474
475 static struct snd_pcm_hardware snd_sb16_playback =
476 {
477         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
478                                  SNDRV_PCM_INFO_MMAP_VALID),
479         .formats =              0,
480         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_44100,
481         .rate_min =             4000,
482         .rate_max =             44100,
483         .channels_min =         1,
484         .channels_max =         2,
485         .buffer_bytes_max =     (128*1024),
486         .period_bytes_min =     64,
487         .period_bytes_max =     (128*1024),
488         .periods_min =          1,
489         .periods_max =          1024,
490         .fifo_size =            0,
491 };
492
493 static struct snd_pcm_hardware snd_sb16_capture =
494 {
495         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
496                                  SNDRV_PCM_INFO_MMAP_VALID),
497         .formats =              0,
498         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_44100,
499         .rate_min =             4000,
500         .rate_max =             44100,
501         .channels_min =         1,
502         .channels_max =         2,
503         .buffer_bytes_max =     (128*1024),
504         .period_bytes_min =     64,
505         .period_bytes_max =     (128*1024),
506         .periods_min =          1,
507         .periods_max =          1024,
508         .fifo_size =            0,
509 };
510
511 /*
512  *  open/close
513  */
514
515 static int snd_sb16_playback_open(struct snd_pcm_substream *substream)
516 {
517         unsigned long flags;
518         struct snd_sb *chip = snd_pcm_substream_chip(substream);
519         struct snd_pcm_runtime *runtime = substream->runtime;
520
521         spin_lock_irqsave(&chip->open_lock, flags);
522         if (chip->mode & SB_MODE_PLAYBACK) {
523                 spin_unlock_irqrestore(&chip->open_lock, flags);
524                 return -EAGAIN;
525         }
526         runtime->hw = snd_sb16_playback;
527
528         /* skip if 16 bit DMA was reserved for capture */
529         if (chip->force_mode16 & SB_MODE_CAPTURE_16)
530                 goto __skip_16bit;
531
532         if (chip->dma16 >= 0 && !(chip->mode & SB_MODE_CAPTURE_16)) {
533                 chip->mode |= SB_MODE_PLAYBACK_16;
534                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE;
535                 /* Vibra16X hack */
536                 if (chip->dma16 <= 3) {
537                         runtime->hw.buffer_bytes_max =
538                         runtime->hw.period_bytes_max = 64 * 1024;
539                 } else {
540                         snd_sb16_csp_playback_open(chip, runtime);
541                 }
542                 goto __open_ok;
543         }
544
545       __skip_16bit:
546         if (chip->dma8 >= 0 && !(chip->mode & SB_MODE_CAPTURE_8)) {
547                 chip->mode |= SB_MODE_PLAYBACK_8;
548                 /* DSP v 4.xx can transfer 16bit data through 8bit DMA channel, SBHWPG 2-7 */
549                 if (chip->dma16 < 0) {
550                         runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE;
551                         chip->mode |= SB_MODE_PLAYBACK_16;
552                 } else {
553                         runtime->hw.formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8;
554                 }
555                 runtime->hw.buffer_bytes_max =
556                 runtime->hw.period_bytes_max = 64 * 1024;
557                 goto __open_ok;
558         }
559         spin_unlock_irqrestore(&chip->open_lock, flags);
560         return -EAGAIN;
561
562       __open_ok:
563         if (chip->hardware == SB_HW_ALS100)
564                 runtime->hw.rate_max = 48000;
565         if (chip->hardware == SB_HW_CS5530) {
566                 runtime->hw.buffer_bytes_max = 32 * 1024;
567                 runtime->hw.periods_min = 2;
568                 runtime->hw.rate_min = 44100;
569         }
570         if (chip->mode & SB_RATE_LOCK)
571                 runtime->hw.rate_min = runtime->hw.rate_max = chip->locked_rate;
572         chip->playback_substream = substream;
573         spin_unlock_irqrestore(&chip->open_lock, flags);
574         return 0;
575 }
576
577 static int snd_sb16_playback_close(struct snd_pcm_substream *substream)
578 {
579         unsigned long flags;
580         struct snd_sb *chip = snd_pcm_substream_chip(substream);
581
582         snd_sb16_csp_playback_close(chip);
583         spin_lock_irqsave(&chip->open_lock, flags);
584         chip->playback_substream = NULL;
585         chip->mode &= ~SB_MODE_PLAYBACK;
586         spin_unlock_irqrestore(&chip->open_lock, flags);
587         return 0;
588 }
589
590 static int snd_sb16_capture_open(struct snd_pcm_substream *substream)
591 {
592         unsigned long flags;
593         struct snd_sb *chip = snd_pcm_substream_chip(substream);
594         struct snd_pcm_runtime *runtime = substream->runtime;
595
596         spin_lock_irqsave(&chip->open_lock, flags);
597         if (chip->mode & SB_MODE_CAPTURE) {
598                 spin_unlock_irqrestore(&chip->open_lock, flags);
599                 return -EAGAIN;
600         }
601         runtime->hw = snd_sb16_capture;
602
603         /* skip if 16 bit DMA was reserved for playback */
604         if (chip->force_mode16 & SB_MODE_PLAYBACK_16)
605                 goto __skip_16bit;
606
607         if (chip->dma16 >= 0 && !(chip->mode & SB_MODE_PLAYBACK_16)) {
608                 chip->mode |= SB_MODE_CAPTURE_16;
609                 runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE;
610                 /* Vibra16X hack */
611                 if (chip->dma16 <= 3) {
612                         runtime->hw.buffer_bytes_max =
613                         runtime->hw.period_bytes_max = 64 * 1024;
614                 } else {
615                         snd_sb16_csp_capture_open(chip, runtime);
616                 }
617                 goto __open_ok;
618         }
619
620       __skip_16bit:
621         if (chip->dma8 >= 0 && !(chip->mode & SB_MODE_PLAYBACK_8)) {
622                 chip->mode |= SB_MODE_CAPTURE_8;
623                 /* DSP v 4.xx can transfer 16bit data through 8bit DMA channel, SBHWPG 2-7 */
624                 if (chip->dma16 < 0) {
625                         runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE;
626                         chip->mode |= SB_MODE_CAPTURE_16;
627                 } else {
628                         runtime->hw.formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8;
629                 }
630                 runtime->hw.buffer_bytes_max =
631                 runtime->hw.period_bytes_max = 64 * 1024;
632                 goto __open_ok;
633         }
634         spin_unlock_irqrestore(&chip->open_lock, flags);
635         return -EAGAIN;
636
637       __open_ok:
638         if (chip->hardware == SB_HW_ALS100)
639                 runtime->hw.rate_max = 48000;
640         if (chip->hardware == SB_HW_CS5530) {
641                 runtime->hw.buffer_bytes_max = 32 * 1024;
642                 runtime->hw.periods_min = 2;
643                 runtime->hw.rate_min = 44100;
644         }
645         if (chip->mode & SB_RATE_LOCK)
646                 runtime->hw.rate_min = runtime->hw.rate_max = chip->locked_rate;
647         chip->capture_substream = substream;
648         spin_unlock_irqrestore(&chip->open_lock, flags);
649         return 0;
650 }
651
652 static int snd_sb16_capture_close(struct snd_pcm_substream *substream)
653 {
654         unsigned long flags;
655         struct snd_sb *chip = snd_pcm_substream_chip(substream);
656
657         snd_sb16_csp_capture_close(chip);
658         spin_lock_irqsave(&chip->open_lock, flags);
659         chip->capture_substream = NULL;
660         chip->mode &= ~SB_MODE_CAPTURE;
661         spin_unlock_irqrestore(&chip->open_lock, flags);
662         return 0;
663 }
664
665 /*
666  *  DMA control interface
667  */
668
669 static int snd_sb16_set_dma_mode(struct snd_sb *chip, int what)
670 {
671         if (chip->dma8 < 0 || chip->dma16 < 0) {
672                 if (snd_BUG_ON(what))
673                         return -EINVAL;
674                 return 0;
675         }
676         if (what == 0) {
677                 chip->force_mode16 = 0;
678         } else if (what == 1) {
679                 chip->force_mode16 = SB_MODE_PLAYBACK_16;
680         } else if (what == 2) {
681                 chip->force_mode16 = SB_MODE_CAPTURE_16;
682         } else {
683                 return -EINVAL;
684         }
685         return 0;
686 }
687
688 static int snd_sb16_get_dma_mode(struct snd_sb *chip)
689 {
690         if (chip->dma8 < 0 || chip->dma16 < 0)
691                 return 0;
692         switch (chip->force_mode16) {
693         case SB_MODE_PLAYBACK_16:
694                 return 1;
695         case SB_MODE_CAPTURE_16:
696                 return 2;
697         default:
698                 return 0;
699         }
700 }
701
702 static int snd_sb16_dma_control_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
703 {
704         static char *texts[3] = {
705                 "Auto", "Playback", "Capture"
706         };
707
708         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
709         uinfo->count = 1;
710         uinfo->value.enumerated.items = 3;
711         if (uinfo->value.enumerated.item > 2)
712                 uinfo->value.enumerated.item = 2;
713         strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
714         return 0;
715 }
716
717 static int snd_sb16_dma_control_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
718 {
719         struct snd_sb *chip = snd_kcontrol_chip(kcontrol);
720         unsigned long flags;
721         
722         spin_lock_irqsave(&chip->reg_lock, flags);
723         ucontrol->value.enumerated.item[0] = snd_sb16_get_dma_mode(chip);
724         spin_unlock_irqrestore(&chip->reg_lock, flags);
725         return 0;
726 }
727
728 static int snd_sb16_dma_control_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
729 {
730         struct snd_sb *chip = snd_kcontrol_chip(kcontrol);
731         unsigned long flags;
732         unsigned char nval, oval;
733         int change;
734         
735         if ((nval = ucontrol->value.enumerated.item[0]) > 2)
736                 return -EINVAL;
737         spin_lock_irqsave(&chip->reg_lock, flags);
738         oval = snd_sb16_get_dma_mode(chip);
739         change = nval != oval;
740         snd_sb16_set_dma_mode(chip, nval);
741         spin_unlock_irqrestore(&chip->reg_lock, flags);
742         return change;
743 }
744
745 static struct snd_kcontrol_new snd_sb16_dma_control = {
746         .iface = SNDRV_CTL_ELEM_IFACE_CARD,
747         .name = "16-bit DMA Allocation",
748         .info = snd_sb16_dma_control_info,
749         .get = snd_sb16_dma_control_get,
750         .put = snd_sb16_dma_control_put
751 };
752
753 /*
754  *  Initialization part
755  */
756  
757 int snd_sb16dsp_configure(struct snd_sb * chip)
758 {
759         unsigned long flags;
760         unsigned char irqreg = 0, dmareg = 0, mpureg;
761         unsigned char realirq, realdma, realmpureg;
762         /* note: mpu register should be present only on SB16 Vibra soundcards */
763
764         // printk(KERN_DEBUG "codec->irq=%i, codec->dma8=%i, codec->dma16=%i\n", chip->irq, chip->dma8, chip->dma16);
765         spin_lock_irqsave(&chip->mixer_lock, flags);
766         mpureg = snd_sbmixer_read(chip, SB_DSP4_MPUSETUP) & ~0x06;
767         spin_unlock_irqrestore(&chip->mixer_lock, flags);
768         switch (chip->irq) {
769         case 2:
770         case 9:
771                 irqreg |= SB_IRQSETUP_IRQ9;
772                 break;
773         case 5:
774                 irqreg |= SB_IRQSETUP_IRQ5;
775                 break;
776         case 7:
777                 irqreg |= SB_IRQSETUP_IRQ7;
778                 break;
779         case 10:
780                 irqreg |= SB_IRQSETUP_IRQ10;
781                 break;
782         default:
783                 return -EINVAL;
784         }
785         if (chip->dma8 >= 0) {
786                 switch (chip->dma8) {
787                 case 0:
788                         dmareg |= SB_DMASETUP_DMA0;
789                         break;
790                 case 1:
791                         dmareg |= SB_DMASETUP_DMA1;
792                         break;
793                 case 3:
794                         dmareg |= SB_DMASETUP_DMA3;
795                         break;
796                 default:
797                         return -EINVAL;
798                 }
799         }
800         if (chip->dma16 >= 0 && chip->dma16 != chip->dma8) {
801                 switch (chip->dma16) {
802                 case 5:
803                         dmareg |= SB_DMASETUP_DMA5;
804                         break;
805                 case 6:
806                         dmareg |= SB_DMASETUP_DMA6;
807                         break;
808                 case 7:
809                         dmareg |= SB_DMASETUP_DMA7;
810                         break;
811                 default:
812                         return -EINVAL;
813                 }
814         }
815         switch (chip->mpu_port) {
816         case 0x300:
817                 mpureg |= 0x04;
818                 break;
819         case 0x330:
820                 mpureg |= 0x00;
821                 break;
822         default:
823                 mpureg |= 0x02; /* disable MPU */
824         }
825         spin_lock_irqsave(&chip->mixer_lock, flags);
826
827         snd_sbmixer_write(chip, SB_DSP4_IRQSETUP, irqreg);
828         realirq = snd_sbmixer_read(chip, SB_DSP4_IRQSETUP);
829
830         snd_sbmixer_write(chip, SB_DSP4_DMASETUP, dmareg);
831         realdma = snd_sbmixer_read(chip, SB_DSP4_DMASETUP);
832
833         snd_sbmixer_write(chip, SB_DSP4_MPUSETUP, mpureg);
834         realmpureg = snd_sbmixer_read(chip, SB_DSP4_MPUSETUP);
835
836         spin_unlock_irqrestore(&chip->mixer_lock, flags);
837         if ((~realirq) & irqreg || (~realdma) & dmareg) {
838                 snd_printk(KERN_ERR "SB16 [0x%lx]: unable to set DMA & IRQ (PnP device?)\n", chip->port);
839                 snd_printk(KERN_ERR "SB16 [0x%lx]: wanted: irqreg=0x%x, dmareg=0x%x, mpureg = 0x%x\n", chip->port, realirq, realdma, realmpureg);
840                 snd_printk(KERN_ERR "SB16 [0x%lx]:    got: irqreg=0x%x, dmareg=0x%x, mpureg = 0x%x\n", chip->port, irqreg, dmareg, mpureg);
841                 return -ENODEV;
842         }
843         return 0;
844 }
845
846 static struct snd_pcm_ops snd_sb16_playback_ops = {
847         .open =         snd_sb16_playback_open,
848         .close =        snd_sb16_playback_close,
849         .ioctl =        snd_pcm_lib_ioctl,
850         .hw_params =    snd_sb16_hw_params,
851         .hw_free =      snd_sb16_hw_free,
852         .prepare =      snd_sb16_playback_prepare,
853         .trigger =      snd_sb16_playback_trigger,
854         .pointer =      snd_sb16_playback_pointer,
855 };
856
857 static struct snd_pcm_ops snd_sb16_capture_ops = {
858         .open =         snd_sb16_capture_open,
859         .close =        snd_sb16_capture_close,
860         .ioctl =        snd_pcm_lib_ioctl,
861         .hw_params =    snd_sb16_hw_params,
862         .hw_free =      snd_sb16_hw_free,
863         .prepare =      snd_sb16_capture_prepare,
864         .trigger =      snd_sb16_capture_trigger,
865         .pointer =      snd_sb16_capture_pointer,
866 };
867
868 int snd_sb16dsp_pcm(struct snd_sb * chip, int device, struct snd_pcm ** rpcm)
869 {
870         struct snd_card *card = chip->card;
871         struct snd_pcm *pcm;
872         int err;
873
874         if (rpcm)
875                 *rpcm = NULL;
876         if ((err = snd_pcm_new(card, "SB16 DSP", device, 1, 1, &pcm)) < 0)
877                 return err;
878         sprintf(pcm->name, "DSP v%i.%i", chip->version >> 8, chip->version & 0xff);
879         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
880         pcm->private_data = chip;
881
882         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sb16_playback_ops);
883         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sb16_capture_ops);
884
885         if (chip->dma16 >= 0 && chip->dma8 != chip->dma16)
886                 snd_ctl_add(card, snd_ctl_new1(&snd_sb16_dma_control, chip));
887         else
888                 pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX;
889
890         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
891                                               snd_dma_isa_data(),
892                                               64*1024, 128*1024);
893
894         if (rpcm)
895                 *rpcm = pcm;
896         return 0;
897 }
898
899 const struct snd_pcm_ops *snd_sb16dsp_get_pcm_ops(int direction)
900 {
901         return direction == SNDRV_PCM_STREAM_PLAYBACK ?
902                 &snd_sb16_playback_ops : &snd_sb16_capture_ops;
903 }
904
905 EXPORT_SYMBOL(snd_sb16dsp_pcm);
906 EXPORT_SYMBOL(snd_sb16dsp_get_pcm_ops);
907 EXPORT_SYMBOL(snd_sb16dsp_configure);
908 EXPORT_SYMBOL(snd_sb16dsp_interrupt);
909
910 /*
911  *  INIT part
912  */
913
914 static int __init alsa_sb16_init(void)
915 {
916         return 0;
917 }
918
919 static void __exit alsa_sb16_exit(void)
920 {
921 }
922
923 module_init(alsa_sb16_init)
924 module_exit(alsa_sb16_exit)