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TOMOYO Linux Cross Reference
Linux/sound/isa/gus/gus_pcm.c

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  1 /*
  2  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  3  *  Routines for control of GF1 chip (PCM things)
  4  *
  5  *  InterWave chips supports interleaved DMA, but this feature isn't used in
  6  *  this code.
  7  *  
  8  *  This code emulates autoinit DMA transfer for playback, recording by GF1
  9  *  chip doesn't support autoinit DMA.
 10  *
 11  *
 12  *   This program is free software; you can redistribute it and/or modify
 13  *   it under the terms of the GNU General Public License as published by
 14  *   the Free Software Foundation; either version 2 of the License, or
 15  *   (at your option) any later version.
 16  *
 17  *   This program is distributed in the hope that it will be useful,
 18  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 19  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 20  *   GNU General Public License for more details.
 21  *
 22  *   You should have received a copy of the GNU General Public License
 23  *   along with this program; if not, write to the Free Software
 24  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 25  *
 26  */
 27 
 28 #include <asm/dma.h>
 29 #include <linux/slab.h>
 30 #include <linux/sched/signal.h>
 31 
 32 #include <sound/core.h>
 33 #include <sound/control.h>
 34 #include <sound/gus.h>
 35 #include <sound/pcm_params.h>
 36 #include "gus_tables.h"
 37 
 38 /* maximum rate */
 39 
 40 #define SNDRV_GF1_PCM_RATE              48000
 41 
 42 #define SNDRV_GF1_PCM_PFLG_NONE         0
 43 #define SNDRV_GF1_PCM_PFLG_ACTIVE       (1<<0)
 44 #define SNDRV_GF1_PCM_PFLG_NEUTRAL      (2<<0)
 45 
 46 struct gus_pcm_private {
 47         struct snd_gus_card * gus;
 48         struct snd_pcm_substream *substream;
 49         spinlock_t lock;
 50         unsigned int voices;
 51         struct snd_gus_voice *pvoices[2];
 52         unsigned int memory;
 53         unsigned short flags;
 54         unsigned char voice_ctrl, ramp_ctrl;
 55         unsigned int bpos;
 56         unsigned int blocks;
 57         unsigned int block_size;
 58         unsigned int dma_size;
 59         wait_queue_head_t sleep;
 60         atomic_t dma_count;
 61         int final_volume;
 62 };
 63 
 64 static void snd_gf1_pcm_block_change_ack(struct snd_gus_card * gus, void *private_data)
 65 {
 66         struct gus_pcm_private *pcmp = private_data;
 67 
 68         if (pcmp) {
 69                 atomic_dec(&pcmp->dma_count);
 70                 wake_up(&pcmp->sleep);
 71         }
 72 }
 73 
 74 static int snd_gf1_pcm_block_change(struct snd_pcm_substream *substream,
 75                                     unsigned int offset,
 76                                     unsigned int addr,
 77                                     unsigned int count)
 78 {
 79         struct snd_gf1_dma_block block;
 80         struct snd_pcm_runtime *runtime = substream->runtime;
 81         struct gus_pcm_private *pcmp = runtime->private_data;
 82 
 83         count += offset & 31;
 84         offset &= ~31;
 85         /*
 86         snd_printk(KERN_DEBUG "block change - offset = 0x%x, count = 0x%x\n",
 87                    offset, count);
 88         */
 89         memset(&block, 0, sizeof(block));
 90         block.cmd = SNDRV_GF1_DMA_IRQ;
 91         if (snd_pcm_format_unsigned(runtime->format))
 92                 block.cmd |= SNDRV_GF1_DMA_UNSIGNED;
 93         if (snd_pcm_format_width(runtime->format) == 16)
 94                 block.cmd |= SNDRV_GF1_DMA_16BIT;
 95         block.addr = addr & ~31;
 96         block.buffer = runtime->dma_area + offset;
 97         block.buf_addr = runtime->dma_addr + offset;
 98         block.count = count;
 99         block.private_data = pcmp;
100         block.ack = snd_gf1_pcm_block_change_ack;
101         if (!snd_gf1_dma_transfer_block(pcmp->gus, &block, 0, 0))
102                 atomic_inc(&pcmp->dma_count);
103         return 0;
104 }
105 
106 static void snd_gf1_pcm_trigger_up(struct snd_pcm_substream *substream)
107 {
108         struct snd_pcm_runtime *runtime = substream->runtime;
109         struct gus_pcm_private *pcmp = runtime->private_data;
110         struct snd_gus_card * gus = pcmp->gus;
111         unsigned long flags;
112         unsigned char voice_ctrl, ramp_ctrl;
113         unsigned short rate;
114         unsigned int curr, begin, end;
115         unsigned short vol;
116         unsigned char pan;
117         unsigned int voice;
118 
119         spin_lock_irqsave(&pcmp->lock, flags);
120         if (pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE) {
121                 spin_unlock_irqrestore(&pcmp->lock, flags);
122                 return;
123         }
124         pcmp->flags |= SNDRV_GF1_PCM_PFLG_ACTIVE;
125         pcmp->final_volume = 0;
126         spin_unlock_irqrestore(&pcmp->lock, flags);
127         rate = snd_gf1_translate_freq(gus, runtime->rate << 4);
128         /* enable WAVE IRQ */
129         voice_ctrl = snd_pcm_format_width(runtime->format) == 16 ? 0x24 : 0x20;
130         /* enable RAMP IRQ + rollover */
131         ramp_ctrl = 0x24;
132         if (pcmp->blocks == 1) {
133                 voice_ctrl |= 0x08;     /* loop enable */
134                 ramp_ctrl &= ~0x04;     /* disable rollover */
135         }
136         for (voice = 0; voice < pcmp->voices; voice++) {
137                 begin = pcmp->memory + voice * (pcmp->dma_size / runtime->channels);
138                 curr = begin + (pcmp->bpos * pcmp->block_size) / runtime->channels;
139                 end = curr + (pcmp->block_size / runtime->channels);
140                 end -= snd_pcm_format_width(runtime->format) == 16 ? 2 : 1;
141                 /*
142                 snd_printk(KERN_DEBUG "init: curr=0x%x, begin=0x%x, end=0x%x, "
143                            "ctrl=0x%x, ramp=0x%x, rate=0x%x\n",
144                            curr, begin, end, voice_ctrl, ramp_ctrl, rate);
145                 */
146                 pan = runtime->channels == 2 ? (!voice ? 1 : 14) : 8;
147                 vol = !voice ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
148                 spin_lock_irqsave(&gus->reg_lock, flags);
149                 snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
150                 snd_gf1_write8(gus, SNDRV_GF1_VB_PAN, pan);
151                 snd_gf1_write16(gus, SNDRV_GF1_VW_FREQUENCY, rate);
152                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_START, begin << 4, voice_ctrl & 4);
153                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, end << 4, voice_ctrl & 4);
154                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_CURRENT, curr << 4, voice_ctrl & 4);
155                 snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, SNDRV_GF1_MIN_VOLUME << 4);
156                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_RATE, 0x2f);
157                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_START, SNDRV_GF1_MIN_OFFSET);
158                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_END, vol >> 8);
159                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
160                 if (!gus->gf1.enh_mode) {
161                         snd_gf1_delay(gus);
162                         snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
163                 }
164                 spin_unlock_irqrestore(&gus->reg_lock, flags);
165         }
166         spin_lock_irqsave(&gus->reg_lock, flags);
167         for (voice = 0; voice < pcmp->voices; voice++) {
168                 snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
169                 if (gus->gf1.enh_mode)
170                         snd_gf1_write8(gus, SNDRV_GF1_VB_MODE, 0x00);   /* deactivate voice */
171                 snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
172                 voice_ctrl &= ~0x20;
173         }
174         voice_ctrl |= 0x20;
175         if (!gus->gf1.enh_mode) {
176                 snd_gf1_delay(gus);
177                 for (voice = 0; voice < pcmp->voices; voice++) {
178                         snd_gf1_select_voice(gus, pcmp->pvoices[voice]->number);
179                         snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
180                         voice_ctrl &= ~0x20;    /* disable IRQ for next voice */
181                 }
182         }
183         spin_unlock_irqrestore(&gus->reg_lock, flags);
184 }
185 
186 static void snd_gf1_pcm_interrupt_wave(struct snd_gus_card * gus,
187                                        struct snd_gus_voice *pvoice)
188 {
189         struct gus_pcm_private * pcmp;
190         struct snd_pcm_runtime *runtime;
191         unsigned char voice_ctrl, ramp_ctrl;
192         unsigned int idx;
193         unsigned int end, step;
194 
195         if (!pvoice->private_data) {
196                 snd_printd("snd_gf1_pcm: unknown wave irq?\n");
197                 snd_gf1_smart_stop_voice(gus, pvoice->number);
198                 return;
199         }
200         pcmp = pvoice->private_data;
201         if (pcmp == NULL) {
202                 snd_printd("snd_gf1_pcm: unknown wave irq?\n");
203                 snd_gf1_smart_stop_voice(gus, pvoice->number);
204                 return;
205         }               
206         gus = pcmp->gus;
207         runtime = pcmp->substream->runtime;
208 
209         spin_lock(&gus->reg_lock);
210         snd_gf1_select_voice(gus, pvoice->number);
211         voice_ctrl = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL) & ~0x8b;
212         ramp_ctrl = (snd_gf1_read8(gus, SNDRV_GF1_VB_VOLUME_CONTROL) & ~0xa4) | 0x03;
213 #if 0
214         snd_gf1_select_voice(gus, pvoice->number);
215         printk(KERN_DEBUG "position = 0x%x\n",
216                (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4));
217         snd_gf1_select_voice(gus, pcmp->pvoices[1]->number);
218         printk(KERN_DEBUG "position = 0x%x\n",
219                (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4));
220         snd_gf1_select_voice(gus, pvoice->number);
221 #endif
222         pcmp->bpos++;
223         pcmp->bpos %= pcmp->blocks;
224         if (pcmp->bpos + 1 >= pcmp->blocks) {   /* last block? */
225                 voice_ctrl |= 0x08;     /* enable loop */
226         } else {
227                 ramp_ctrl |= 0x04;      /* enable rollover */
228         }
229         end = pcmp->memory + (((pcmp->bpos + 1) * pcmp->block_size) / runtime->channels);
230         end -= voice_ctrl & 4 ? 2 : 1;
231         step = pcmp->dma_size / runtime->channels;
232         voice_ctrl |= 0x20;
233         if (!pcmp->final_volume) {
234                 ramp_ctrl |= 0x20;
235                 ramp_ctrl &= ~0x03;
236         }
237         for (idx = 0; idx < pcmp->voices; idx++, end += step) {
238                 snd_gf1_select_voice(gus, pcmp->pvoices[idx]->number);
239                 snd_gf1_write_addr(gus, SNDRV_GF1_VA_END, end << 4, voice_ctrl & 4);
240                 snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
241                 snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
242                 voice_ctrl &= ~0x20;
243         }
244         if (!gus->gf1.enh_mode) {
245                 snd_gf1_delay(gus);
246                 voice_ctrl |= 0x20;
247                 for (idx = 0; idx < pcmp->voices; idx++) {
248                         snd_gf1_select_voice(gus, pcmp->pvoices[idx]->number);
249                         snd_gf1_write8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL, voice_ctrl);
250                         snd_gf1_write8(gus, SNDRV_GF1_VB_VOLUME_CONTROL, ramp_ctrl);
251                         voice_ctrl &= ~0x20;
252                 }
253         }
254         spin_unlock(&gus->reg_lock);
255 
256         snd_pcm_period_elapsed(pcmp->substream);
257 #if 0
258         if ((runtime->flags & SNDRV_PCM_FLG_MMAP) &&
259             *runtime->state == SNDRV_PCM_STATE_RUNNING) {
260                 end = pcmp->bpos * pcmp->block_size;
261                 if (runtime->channels > 1) {
262                         snd_gf1_pcm_block_change(pcmp->substream, end, pcmp->memory + (end / 2), pcmp->block_size / 2);
263                         snd_gf1_pcm_block_change(pcmp->substream, end + (pcmp->block_size / 2), pcmp->memory + (pcmp->dma_size / 2) + (end / 2), pcmp->block_size / 2);
264                 } else {
265                         snd_gf1_pcm_block_change(pcmp->substream, end, pcmp->memory + end, pcmp->block_size);
266                 }
267         }
268 #endif
269 }
270 
271 static void snd_gf1_pcm_interrupt_volume(struct snd_gus_card * gus,
272                                          struct snd_gus_voice * pvoice)
273 {
274         unsigned short vol;
275         int cvoice;
276         struct gus_pcm_private *pcmp = pvoice->private_data;
277 
278         /* stop ramp, but leave rollover bit untouched */
279         spin_lock(&gus->reg_lock);
280         snd_gf1_select_voice(gus, pvoice->number);
281         snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
282         spin_unlock(&gus->reg_lock);
283         if (pcmp == NULL)
284                 return;
285         /* are we active? */
286         if (!(pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE))
287                 return;
288         /* load real volume - better precision */
289         cvoice = pcmp->pvoices[0] == pvoice ? 0 : 1;
290         if (pcmp->substream == NULL)
291                 return;
292         vol = !cvoice ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
293         spin_lock(&gus->reg_lock);
294         snd_gf1_select_voice(gus, pvoice->number);
295         snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, vol);
296         pcmp->final_volume = 1;
297         spin_unlock(&gus->reg_lock);
298 }
299 
300 static void snd_gf1_pcm_volume_change(struct snd_gus_card * gus)
301 {
302 }
303 
304 static int snd_gf1_pcm_poke_block(struct snd_gus_card *gus, unsigned char *buf,
305                                   unsigned int pos, unsigned int count,
306                                   int w16, int invert)
307 {
308         unsigned int len;
309         unsigned long flags;
310 
311         /*
312         printk(KERN_DEBUG
313                "poke block; buf = 0x%x, pos = %i, count = %i, port = 0x%x\n",
314                (int)buf, pos, count, gus->gf1.port);
315         */
316         while (count > 0) {
317                 len = count;
318                 if (len > 512)          /* limit, to allow IRQ */
319                         len = 512;
320                 count -= len;
321                 if (gus->interwave) {
322                         spin_lock_irqsave(&gus->reg_lock, flags);
323                         snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01 | (invert ? 0x08 : 0x00));
324                         snd_gf1_dram_addr(gus, pos);
325                         if (w16) {
326                                 outb(SNDRV_GF1_GW_DRAM_IO16, GUSP(gus, GF1REGSEL));
327                                 outsw(GUSP(gus, GF1DATALOW), buf, len >> 1);
328                         } else {
329                                 outsb(GUSP(gus, DRAM), buf, len);
330                         }
331                         spin_unlock_irqrestore(&gus->reg_lock, flags);
332                         buf += 512;
333                         pos += 512;
334                 } else {
335                         invert = invert ? 0x80 : 0x00;
336                         if (w16) {
337                                 len >>= 1;
338                                 while (len--) {
339                                         snd_gf1_poke(gus, pos++, *buf++);
340                                         snd_gf1_poke(gus, pos++, *buf++ ^ invert);
341                                 }
342                         } else {
343                                 while (len--)
344                                         snd_gf1_poke(gus, pos++, *buf++ ^ invert);
345                         }
346                 }
347                 if (count > 0 && !in_interrupt()) {
348                         schedule_timeout_interruptible(1);
349                         if (signal_pending(current))
350                                 return -EAGAIN;
351                 }
352         }
353         return 0;
354 }
355 
356 static int get_bpos(struct gus_pcm_private *pcmp, int voice, unsigned int pos,
357                     unsigned int len)
358 {
359         unsigned int bpos = pos + (voice * (pcmp->dma_size / 2));
360         if (snd_BUG_ON(bpos > pcmp->dma_size))
361                 return -EIO;
362         if (snd_BUG_ON(bpos + len > pcmp->dma_size))
363                 return -EIO;
364         return bpos;
365 }
366 
367 static int playback_copy_ack(struct snd_pcm_substream *substream,
368                              unsigned int bpos, unsigned int len)
369 {
370         struct snd_pcm_runtime *runtime = substream->runtime;
371         struct gus_pcm_private *pcmp = runtime->private_data;
372         struct snd_gus_card *gus = pcmp->gus;
373         int w16, invert;
374 
375         if (len > 32)
376                 return snd_gf1_pcm_block_change(substream, bpos,
377                                                 pcmp->memory + bpos, len);
378 
379         w16 = (snd_pcm_format_width(runtime->format) == 16);
380         invert = snd_pcm_format_unsigned(runtime->format);
381         return snd_gf1_pcm_poke_block(gus, runtime->dma_area + bpos,
382                                       pcmp->memory + bpos, len, w16, invert);
383 }
384 
385 static int snd_gf1_pcm_playback_copy(struct snd_pcm_substream *substream,
386                                      int voice, unsigned long pos,
387                                      void __user *src, unsigned long count)
388 {
389         struct snd_pcm_runtime *runtime = substream->runtime;
390         struct gus_pcm_private *pcmp = runtime->private_data;
391         unsigned int len = count;
392         int bpos;
393 
394         bpos = get_bpos(pcmp, voice, pos, len);
395         if (bpos < 0)
396                 return pos;
397         if (copy_from_user(runtime->dma_area + bpos, src, len))
398                 return -EFAULT;
399         return playback_copy_ack(substream, bpos, len);
400 }
401 
402 static int snd_gf1_pcm_playback_copy_kernel(struct snd_pcm_substream *substream,
403                                             int voice, unsigned long pos,
404                                             void *src, unsigned long count)
405 {
406         struct snd_pcm_runtime *runtime = substream->runtime;
407         struct gus_pcm_private *pcmp = runtime->private_data;
408         unsigned int len = count;
409         int bpos;
410 
411         bpos = get_bpos(pcmp, voice, pos, len);
412         if (bpos < 0)
413                 return pos;
414         memcpy(runtime->dma_area + bpos, src, len);
415         return playback_copy_ack(substream, bpos, len);
416 }
417 
418 static int snd_gf1_pcm_playback_silence(struct snd_pcm_substream *substream,
419                                         int voice, unsigned long pos,
420                                         unsigned long count)
421 {
422         struct snd_pcm_runtime *runtime = substream->runtime;
423         struct gus_pcm_private *pcmp = runtime->private_data;
424         unsigned int len = count;
425         int bpos;
426         
427         bpos = get_bpos(pcmp, voice, pos, len);
428         if (bpos < 0)
429                 return pos;
430         snd_pcm_format_set_silence(runtime->format, runtime->dma_area + bpos,
431                                    bytes_to_samples(runtime, count));
432         return playback_copy_ack(substream, bpos, len);
433 }
434 
435 static int snd_gf1_pcm_playback_hw_params(struct snd_pcm_substream *substream,
436                                           struct snd_pcm_hw_params *hw_params)
437 {
438         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
439         struct snd_pcm_runtime *runtime = substream->runtime;
440         struct gus_pcm_private *pcmp = runtime->private_data;
441         int err;
442         
443         if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
444                 return err;
445         if (err > 0) {  /* change */
446                 struct snd_gf1_mem_block *block;
447                 if (pcmp->memory > 0) {
448                         snd_gf1_mem_free(&gus->gf1.mem_alloc, pcmp->memory);
449                         pcmp->memory = 0;
450                 }
451                 if ((block = snd_gf1_mem_alloc(&gus->gf1.mem_alloc,
452                                                SNDRV_GF1_MEM_OWNER_DRIVER,
453                                                "GF1 PCM",
454                                                runtime->dma_bytes, 1, 32,
455                                                NULL)) == NULL)
456                         return -ENOMEM;
457                 pcmp->memory = block->ptr;
458         }
459         pcmp->voices = params_channels(hw_params);
460         if (pcmp->pvoices[0] == NULL) {
461                 if ((pcmp->pvoices[0] = snd_gf1_alloc_voice(pcmp->gus, SNDRV_GF1_VOICE_TYPE_PCM, 0, 0)) == NULL)
462                         return -ENOMEM;
463                 pcmp->pvoices[0]->handler_wave = snd_gf1_pcm_interrupt_wave;
464                 pcmp->pvoices[0]->handler_volume = snd_gf1_pcm_interrupt_volume;
465                 pcmp->pvoices[0]->volume_change = snd_gf1_pcm_volume_change;
466                 pcmp->pvoices[0]->private_data = pcmp;
467         }
468         if (pcmp->voices > 1 && pcmp->pvoices[1] == NULL) {
469                 if ((pcmp->pvoices[1] = snd_gf1_alloc_voice(pcmp->gus, SNDRV_GF1_VOICE_TYPE_PCM, 0, 0)) == NULL)
470                         return -ENOMEM;
471                 pcmp->pvoices[1]->handler_wave = snd_gf1_pcm_interrupt_wave;
472                 pcmp->pvoices[1]->handler_volume = snd_gf1_pcm_interrupt_volume;
473                 pcmp->pvoices[1]->volume_change = snd_gf1_pcm_volume_change;
474                 pcmp->pvoices[1]->private_data = pcmp;
475         } else if (pcmp->voices == 1) {
476                 if (pcmp->pvoices[1]) {
477                         snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[1]);
478                         pcmp->pvoices[1] = NULL;
479                 }
480         }
481         return 0;
482 }
483 
484 static int snd_gf1_pcm_playback_hw_free(struct snd_pcm_substream *substream)
485 {
486         struct snd_pcm_runtime *runtime = substream->runtime;
487         struct gus_pcm_private *pcmp = runtime->private_data;
488 
489         snd_pcm_lib_free_pages(substream);
490         if (pcmp->pvoices[0]) {
491                 snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[0]);
492                 pcmp->pvoices[0] = NULL;
493         }
494         if (pcmp->pvoices[1]) {
495                 snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[1]);
496                 pcmp->pvoices[1] = NULL;
497         }
498         if (pcmp->memory > 0) {
499                 snd_gf1_mem_free(&pcmp->gus->gf1.mem_alloc, pcmp->memory);
500                 pcmp->memory = 0;
501         }
502         return 0;
503 }
504 
505 static int snd_gf1_pcm_playback_prepare(struct snd_pcm_substream *substream)
506 {
507         struct snd_pcm_runtime *runtime = substream->runtime;
508         struct gus_pcm_private *pcmp = runtime->private_data;
509 
510         pcmp->bpos = 0;
511         pcmp->dma_size = snd_pcm_lib_buffer_bytes(substream);
512         pcmp->block_size = snd_pcm_lib_period_bytes(substream);
513         pcmp->blocks = pcmp->dma_size / pcmp->block_size;
514         return 0;
515 }
516 
517 static int snd_gf1_pcm_playback_trigger(struct snd_pcm_substream *substream,
518                                         int cmd)
519 {
520         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
521         struct snd_pcm_runtime *runtime = substream->runtime;
522         struct gus_pcm_private *pcmp = runtime->private_data;
523         int voice;
524 
525         if (cmd == SNDRV_PCM_TRIGGER_START) {
526                 snd_gf1_pcm_trigger_up(substream);
527         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
528                 spin_lock(&pcmp->lock);
529                 pcmp->flags &= ~SNDRV_GF1_PCM_PFLG_ACTIVE;
530                 spin_unlock(&pcmp->lock);
531                 voice = pcmp->pvoices[0]->number;
532                 snd_gf1_stop_voices(gus, voice, voice);
533                 if (pcmp->pvoices[1]) {
534                         voice = pcmp->pvoices[1]->number;
535                         snd_gf1_stop_voices(gus, voice, voice);
536                 }
537         } else {
538                 return -EINVAL;
539         }
540         return 0;
541 }
542 
543 static snd_pcm_uframes_t snd_gf1_pcm_playback_pointer(struct snd_pcm_substream *substream)
544 {
545         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
546         struct snd_pcm_runtime *runtime = substream->runtime;
547         struct gus_pcm_private *pcmp = runtime->private_data;
548         unsigned int pos;
549         unsigned char voice_ctrl;
550 
551         pos = 0;
552         spin_lock(&gus->reg_lock);
553         if (pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE) {
554                 snd_gf1_select_voice(gus, pcmp->pvoices[0]->number);
555                 voice_ctrl = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
556                 pos = (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4) - pcmp->memory;
557                 if (substream->runtime->channels > 1)
558                         pos <<= 1;
559                 pos = bytes_to_frames(runtime, pos);
560         }
561         spin_unlock(&gus->reg_lock);
562         return pos;
563 }
564 
565 static const struct snd_ratnum clock = {
566         .num = 9878400/16,
567         .den_min = 2,
568         .den_max = 257,
569         .den_step = 1,
570 };
571 
572 static const struct snd_pcm_hw_constraint_ratnums hw_constraints_clocks  = {
573         .nrats = 1,
574         .rats = &clock,
575 };
576 
577 static int snd_gf1_pcm_capture_hw_params(struct snd_pcm_substream *substream,
578                                          struct snd_pcm_hw_params *hw_params)
579 {
580         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
581 
582         gus->c_dma_size = params_buffer_bytes(hw_params);
583         gus->c_period_size = params_period_bytes(hw_params);
584         gus->c_pos = 0;
585         gus->gf1.pcm_rcntrl_reg = 0x21;         /* IRQ at end, enable & start */
586         if (params_channels(hw_params) > 1)
587                 gus->gf1.pcm_rcntrl_reg |= 2;
588         if (gus->gf1.dma2 > 3)
589                 gus->gf1.pcm_rcntrl_reg |= 4;
590         if (snd_pcm_format_unsigned(params_format(hw_params)))
591                 gus->gf1.pcm_rcntrl_reg |= 0x80;
592         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
593 }
594 
595 static int snd_gf1_pcm_capture_hw_free(struct snd_pcm_substream *substream)
596 {
597         return snd_pcm_lib_free_pages(substream);
598 }
599 
600 static int snd_gf1_pcm_capture_prepare(struct snd_pcm_substream *substream)
601 {
602         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
603         struct snd_pcm_runtime *runtime = substream->runtime;
604 
605         snd_gf1_i_write8(gus, SNDRV_GF1_GB_RECORD_RATE, runtime->rate_den - 2);
606         snd_gf1_i_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, 0); /* disable sampling */
607         snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);     /* Sampling Control Register */
608         snd_dma_program(gus->gf1.dma2, runtime->dma_addr, gus->c_period_size, DMA_MODE_READ);
609         return 0;
610 }
611 
612 static int snd_gf1_pcm_capture_trigger(struct snd_pcm_substream *substream,
613                                        int cmd)
614 {
615         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
616         int val;
617         
618         if (cmd == SNDRV_PCM_TRIGGER_START) {
619                 val = gus->gf1.pcm_rcntrl_reg;
620         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
621                 val = 0;
622         } else {
623                 return -EINVAL;
624         }
625 
626         spin_lock(&gus->reg_lock);
627         snd_gf1_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, val);
628         snd_gf1_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);
629         spin_unlock(&gus->reg_lock);
630         return 0;
631 }
632 
633 static snd_pcm_uframes_t snd_gf1_pcm_capture_pointer(struct snd_pcm_substream *substream)
634 {
635         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
636         int pos = snd_dma_pointer(gus->gf1.dma2, gus->c_period_size);
637         pos = bytes_to_frames(substream->runtime, (gus->c_pos + pos) % gus->c_dma_size);
638         return pos;
639 }
640 
641 static void snd_gf1_pcm_interrupt_dma_read(struct snd_gus_card * gus)
642 {
643         snd_gf1_i_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, 0); /* disable sampling */
644         snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);     /* Sampling Control Register */
645         if (gus->pcm_cap_substream != NULL) {
646                 snd_gf1_pcm_capture_prepare(gus->pcm_cap_substream); 
647                 snd_gf1_pcm_capture_trigger(gus->pcm_cap_substream, SNDRV_PCM_TRIGGER_START);
648                 gus->c_pos += gus->c_period_size;
649                 snd_pcm_period_elapsed(gus->pcm_cap_substream);
650         }
651 }
652 
653 static struct snd_pcm_hardware snd_gf1_pcm_playback =
654 {
655         .info =                 SNDRV_PCM_INFO_NONINTERLEAVED,
656         .formats                = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
657                                  SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
658         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
659         .rate_min =             5510,
660         .rate_max =             48000,
661         .channels_min =         1,
662         .channels_max =         2,
663         .buffer_bytes_max =     (128*1024),
664         .period_bytes_min =     64,
665         .period_bytes_max =     (128*1024),
666         .periods_min =          1,
667         .periods_max =          1024,
668         .fifo_size =            0,
669 };
670 
671 static struct snd_pcm_hardware snd_gf1_pcm_capture =
672 {
673         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
674                                  SNDRV_PCM_INFO_MMAP_VALID),
675         .formats =              SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8,
676         .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_44100,
677         .rate_min =             5510,
678         .rate_max =             44100,
679         .channels_min =         1,
680         .channels_max =         2,
681         .buffer_bytes_max =     (128*1024),
682         .period_bytes_min =     64,
683         .period_bytes_max =     (128*1024),
684         .periods_min =          1,
685         .periods_max =          1024,
686         .fifo_size =            0,
687 };
688 
689 static void snd_gf1_pcm_playback_free(struct snd_pcm_runtime *runtime)
690 {
691         kfree(runtime->private_data);
692 }
693 
694 static int snd_gf1_pcm_playback_open(struct snd_pcm_substream *substream)
695 {
696         struct gus_pcm_private *pcmp;
697         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
698         struct snd_pcm_runtime *runtime = substream->runtime;
699         int err;
700 
701         pcmp = kzalloc(sizeof(*pcmp), GFP_KERNEL);
702         if (pcmp == NULL)
703                 return -ENOMEM;
704         pcmp->gus = gus;
705         spin_lock_init(&pcmp->lock);
706         init_waitqueue_head(&pcmp->sleep);
707         atomic_set(&pcmp->dma_count, 0);
708 
709         runtime->private_data = pcmp;
710         runtime->private_free = snd_gf1_pcm_playback_free;
711 
712 #if 0
713         printk(KERN_DEBUG "playback.buffer = 0x%lx, gf1.pcm_buffer = 0x%lx\n",
714                (long) pcm->playback.buffer, (long) gus->gf1.pcm_buffer);
715 #endif
716         if ((err = snd_gf1_dma_init(gus)) < 0)
717                 return err;
718         pcmp->flags = SNDRV_GF1_PCM_PFLG_NONE;
719         pcmp->substream = substream;
720         runtime->hw = snd_gf1_pcm_playback;
721         snd_pcm_limit_isa_dma_size(gus->gf1.dma1, &runtime->hw.buffer_bytes_max);
722         snd_pcm_limit_isa_dma_size(gus->gf1.dma1, &runtime->hw.period_bytes_max);
723         snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64);
724         return 0;
725 }
726 
727 static int snd_gf1_pcm_playback_close(struct snd_pcm_substream *substream)
728 {
729         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
730         struct snd_pcm_runtime *runtime = substream->runtime;
731         struct gus_pcm_private *pcmp = runtime->private_data;
732         
733         if (!wait_event_timeout(pcmp->sleep, (atomic_read(&pcmp->dma_count) <= 0), 2*HZ))
734                 snd_printk(KERN_ERR "gf1 pcm - serious DMA problem\n");
735 
736         snd_gf1_dma_done(gus);  
737         return 0;
738 }
739 
740 static int snd_gf1_pcm_capture_open(struct snd_pcm_substream *substream)
741 {
742         struct snd_pcm_runtime *runtime = substream->runtime;
743         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
744 
745         gus->gf1.interrupt_handler_dma_read = snd_gf1_pcm_interrupt_dma_read;
746         gus->pcm_cap_substream = substream;
747         substream->runtime->hw = snd_gf1_pcm_capture;
748         snd_pcm_limit_isa_dma_size(gus->gf1.dma2, &runtime->hw.buffer_bytes_max);
749         snd_pcm_limit_isa_dma_size(gus->gf1.dma2, &runtime->hw.period_bytes_max);
750         snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
751                                       &hw_constraints_clocks);
752         return 0;
753 }
754 
755 static int snd_gf1_pcm_capture_close(struct snd_pcm_substream *substream)
756 {
757         struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
758 
759         gus->pcm_cap_substream = NULL;
760         snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_DMA_READ);
761         return 0;
762 }
763 
764 static int snd_gf1_pcm_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
765 {
766         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
767         uinfo->count = 2;
768         uinfo->value.integer.min = 0;
769         uinfo->value.integer.max = 127;
770         return 0;
771 }
772 
773 static int snd_gf1_pcm_volume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
774 {
775         struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
776         unsigned long flags;
777         
778         spin_lock_irqsave(&gus->pcm_volume_level_lock, flags);
779         ucontrol->value.integer.value[0] = gus->gf1.pcm_volume_level_left1;
780         ucontrol->value.integer.value[1] = gus->gf1.pcm_volume_level_right1;
781         spin_unlock_irqrestore(&gus->pcm_volume_level_lock, flags);
782         return 0;
783 }
784 
785 static int snd_gf1_pcm_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
786 {
787         struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
788         unsigned long flags;
789         int change;
790         unsigned int idx;
791         unsigned short val1, val2, vol;
792         struct gus_pcm_private *pcmp;
793         struct snd_gus_voice *pvoice;
794         
795         val1 = ucontrol->value.integer.value[0] & 127;
796         val2 = ucontrol->value.integer.value[1] & 127;
797         spin_lock_irqsave(&gus->pcm_volume_level_lock, flags);
798         change = val1 != gus->gf1.pcm_volume_level_left1 ||
799                  val2 != gus->gf1.pcm_volume_level_right1;
800         gus->gf1.pcm_volume_level_left1 = val1;
801         gus->gf1.pcm_volume_level_right1 = val2;
802         gus->gf1.pcm_volume_level_left = snd_gf1_lvol_to_gvol_raw(val1 << 9) << 4;
803         gus->gf1.pcm_volume_level_right = snd_gf1_lvol_to_gvol_raw(val2 << 9) << 4;
804         spin_unlock_irqrestore(&gus->pcm_volume_level_lock, flags);
805         /* are we active? */
806         spin_lock_irqsave(&gus->voice_alloc, flags);
807         for (idx = 0; idx < 32; idx++) {
808                 pvoice = &gus->gf1.voices[idx];
809                 if (!pvoice->pcm)
810                         continue;
811                 pcmp = pvoice->private_data;
812                 if (!(pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE))
813                         continue;
814                 /* load real volume - better precision */
815                 spin_lock(&gus->reg_lock);
816                 snd_gf1_select_voice(gus, pvoice->number);
817                 snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
818                 vol = pvoice == pcmp->pvoices[0] ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
819                 snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, vol);
820                 pcmp->final_volume = 1;
821                 spin_unlock(&gus->reg_lock);
822         }
823         spin_unlock_irqrestore(&gus->voice_alloc, flags);
824         return change;
825 }
826 
827 static const struct snd_kcontrol_new snd_gf1_pcm_volume_control =
828 {
829         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
830         .name = "PCM Playback Volume",
831         .info = snd_gf1_pcm_volume_info,
832         .get = snd_gf1_pcm_volume_get,
833         .put = snd_gf1_pcm_volume_put
834 };
835 
836 static const struct snd_kcontrol_new snd_gf1_pcm_volume_control1 =
837 {
838         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
839         .name = "GPCM Playback Volume",
840         .info = snd_gf1_pcm_volume_info,
841         .get = snd_gf1_pcm_volume_get,
842         .put = snd_gf1_pcm_volume_put
843 };
844 
845 static struct snd_pcm_ops snd_gf1_pcm_playback_ops = {
846         .open =         snd_gf1_pcm_playback_open,
847         .close =        snd_gf1_pcm_playback_close,
848         .ioctl =        snd_pcm_lib_ioctl,
849         .hw_params =    snd_gf1_pcm_playback_hw_params,
850         .hw_free =      snd_gf1_pcm_playback_hw_free,
851         .prepare =      snd_gf1_pcm_playback_prepare,
852         .trigger =      snd_gf1_pcm_playback_trigger,
853         .pointer =      snd_gf1_pcm_playback_pointer,
854         .copy_user =    snd_gf1_pcm_playback_copy,
855         .copy_kernel =  snd_gf1_pcm_playback_copy_kernel,
856         .fill_silence = snd_gf1_pcm_playback_silence,
857 };
858 
859 static struct snd_pcm_ops snd_gf1_pcm_capture_ops = {
860         .open =         snd_gf1_pcm_capture_open,
861         .close =        snd_gf1_pcm_capture_close,
862         .ioctl =        snd_pcm_lib_ioctl,
863         .hw_params =    snd_gf1_pcm_capture_hw_params,
864         .hw_free =      snd_gf1_pcm_capture_hw_free,
865         .prepare =      snd_gf1_pcm_capture_prepare,
866         .trigger =      snd_gf1_pcm_capture_trigger,
867         .pointer =      snd_gf1_pcm_capture_pointer,
868 };
869 
870 int snd_gf1_pcm_new(struct snd_gus_card *gus, int pcm_dev, int control_index)
871 {
872         struct snd_card *card;
873         struct snd_kcontrol *kctl;
874         struct snd_pcm *pcm;
875         struct snd_pcm_substream *substream;
876         int capture, err;
877 
878         card = gus->card;
879         capture = !gus->interwave && !gus->ess_flag && !gus->ace_flag ? 1 : 0;
880         err = snd_pcm_new(card,
881                           gus->interwave ? "AMD InterWave" : "GF1",
882                           pcm_dev,
883                           gus->gf1.pcm_channels / 2,
884                           capture,
885                           &pcm);
886         if (err < 0)
887                 return err;
888         pcm->private_data = gus;
889         /* playback setup */
890         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_gf1_pcm_playback_ops);
891 
892         for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
893                 snd_pcm_lib_preallocate_pages(substream, SNDRV_DMA_TYPE_DEV,
894                                               snd_dma_isa_data(),
895                                               64*1024, gus->gf1.dma1 > 3 ? 128*1024 : 64*1024);
896         
897         pcm->info_flags = 0;
898         pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
899         if (capture) {
900                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_gf1_pcm_capture_ops);
901                 if (gus->gf1.dma2 == gus->gf1.dma1)
902                         pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX;
903                 snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
904                                               SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(),
905                                               64*1024, gus->gf1.dma2 > 3 ? 128*1024 : 64*1024);
906         }
907         strcpy(pcm->name, pcm->id);
908         if (gus->interwave) {
909                 sprintf(pcm->name + strlen(pcm->name), " rev %c", gus->revision + 'A');
910         }
911         strcat(pcm->name, " (synth)");
912         gus->pcm = pcm;
913 
914         if (gus->codec_flag)
915                 kctl = snd_ctl_new1(&snd_gf1_pcm_volume_control1, gus);
916         else
917                 kctl = snd_ctl_new1(&snd_gf1_pcm_volume_control, gus);
918         if ((err = snd_ctl_add(card, kctl)) < 0)
919                 return err;
920         kctl->id.index = control_index;
921 
922         return 0;
923 }
924 
925 

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