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