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gus_pcm.c
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1 /*
2  * Copyright (c) by Jaroslav Kysela <[email protected]>
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 <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/gus.h>
33 #include <sound/pcm_params.h>
34 #include "gus_tables.h"
35 
36 /* maximum rate */
37 
38 #define SNDRV_GF1_PCM_RATE 48000
39 
40 #define SNDRV_GF1_PCM_PFLG_NONE 0
41 #define SNDRV_GF1_PCM_PFLG_ACTIVE (1<<0)
42 #define SNDRV_GF1_PCM_PFLG_NEUTRAL (2<<0)
43 
44 struct gus_pcm_private {
45  struct snd_gus_card * gus;
46  struct snd_pcm_substream *substream;
47  spinlock_t lock;
48  unsigned int voices;
49  struct snd_gus_voice *pvoices[2];
50  unsigned int memory;
51  unsigned short flags;
52  unsigned char voice_ctrl, ramp_ctrl;
53  unsigned int bpos;
54  unsigned int blocks;
55  unsigned int block_size;
56  unsigned int dma_size;
57  wait_queue_head_t sleep;
58  atomic_t dma_count;
59  int final_volume;
60 };
61 
62 static int snd_gf1_pcm_use_dma = 1;
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 snd_gf1_pcm_playback_copy(struct snd_pcm_substream *substream,
357  int voice,
358  snd_pcm_uframes_t pos,
359  void __user *src,
360  snd_pcm_uframes_t count)
361 {
362  struct snd_pcm_runtime *runtime = substream->runtime;
363  struct gus_pcm_private *pcmp = runtime->private_data;
364  unsigned int bpos, len;
365 
366  bpos = samples_to_bytes(runtime, pos) + (voice * (pcmp->dma_size / 2));
367  len = samples_to_bytes(runtime, count);
368  if (snd_BUG_ON(bpos > pcmp->dma_size))
369  return -EIO;
370  if (snd_BUG_ON(bpos + len > pcmp->dma_size))
371  return -EIO;
372  if (copy_from_user(runtime->dma_area + bpos, src, len))
373  return -EFAULT;
374  if (snd_gf1_pcm_use_dma && len > 32) {
375  return snd_gf1_pcm_block_change(substream, bpos, pcmp->memory + bpos, len);
376  } else {
377  struct snd_gus_card *gus = pcmp->gus;
378  int err, w16, invert;
379 
380  w16 = (snd_pcm_format_width(runtime->format) == 16);
381  invert = snd_pcm_format_unsigned(runtime->format);
382  if ((err = snd_gf1_pcm_poke_block(gus, runtime->dma_area + bpos, pcmp->memory + bpos, len, w16, invert)) < 0)
383  return err;
384  }
385  return 0;
386 }
387 
388 static int snd_gf1_pcm_playback_silence(struct snd_pcm_substream *substream,
389  int voice,
390  snd_pcm_uframes_t pos,
391  snd_pcm_uframes_t count)
392 {
393  struct snd_pcm_runtime *runtime = substream->runtime;
394  struct gus_pcm_private *pcmp = runtime->private_data;
395  unsigned int bpos, len;
396 
397  bpos = samples_to_bytes(runtime, pos) + (voice * (pcmp->dma_size / 2));
398  len = samples_to_bytes(runtime, count);
399  if (snd_BUG_ON(bpos > pcmp->dma_size))
400  return -EIO;
401  if (snd_BUG_ON(bpos + len > pcmp->dma_size))
402  return -EIO;
403  snd_pcm_format_set_silence(runtime->format, runtime->dma_area + bpos, count);
404  if (snd_gf1_pcm_use_dma && len > 32) {
405  return snd_gf1_pcm_block_change(substream, bpos, pcmp->memory + bpos, len);
406  } else {
407  struct snd_gus_card *gus = pcmp->gus;
408  int err, w16, invert;
409 
410  w16 = (snd_pcm_format_width(runtime->format) == 16);
411  invert = snd_pcm_format_unsigned(runtime->format);
412  if ((err = snd_gf1_pcm_poke_block(gus, runtime->dma_area + bpos, pcmp->memory + bpos, len, w16, invert)) < 0)
413  return err;
414  }
415  return 0;
416 }
417 
418 static int snd_gf1_pcm_playback_hw_params(struct snd_pcm_substream *substream,
419  struct snd_pcm_hw_params *hw_params)
420 {
421  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
422  struct snd_pcm_runtime *runtime = substream->runtime;
423  struct gus_pcm_private *pcmp = runtime->private_data;
424  int err;
425 
426  if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
427  return err;
428  if (err > 0) { /* change */
429  struct snd_gf1_mem_block *block;
430  if (pcmp->memory > 0) {
431  snd_gf1_mem_free(&gus->gf1.mem_alloc, pcmp->memory);
432  pcmp->memory = 0;
433  }
434  if ((block = snd_gf1_mem_alloc(&gus->gf1.mem_alloc,
435  SNDRV_GF1_MEM_OWNER_DRIVER,
436  "GF1 PCM",
437  runtime->dma_bytes, 1, 32,
438  NULL)) == NULL)
439  return -ENOMEM;
440  pcmp->memory = block->ptr;
441  }
442  pcmp->voices = params_channels(hw_params);
443  if (pcmp->pvoices[0] == NULL) {
444  if ((pcmp->pvoices[0] = snd_gf1_alloc_voice(pcmp->gus, SNDRV_GF1_VOICE_TYPE_PCM, 0, 0)) == NULL)
445  return -ENOMEM;
446  pcmp->pvoices[0]->handler_wave = snd_gf1_pcm_interrupt_wave;
447  pcmp->pvoices[0]->handler_volume = snd_gf1_pcm_interrupt_volume;
448  pcmp->pvoices[0]->volume_change = snd_gf1_pcm_volume_change;
449  pcmp->pvoices[0]->private_data = pcmp;
450  }
451  if (pcmp->voices > 1 && pcmp->pvoices[1] == NULL) {
452  if ((pcmp->pvoices[1] = snd_gf1_alloc_voice(pcmp->gus, SNDRV_GF1_VOICE_TYPE_PCM, 0, 0)) == NULL)
453  return -ENOMEM;
454  pcmp->pvoices[1]->handler_wave = snd_gf1_pcm_interrupt_wave;
455  pcmp->pvoices[1]->handler_volume = snd_gf1_pcm_interrupt_volume;
456  pcmp->pvoices[1]->volume_change = snd_gf1_pcm_volume_change;
457  pcmp->pvoices[1]->private_data = pcmp;
458  } else if (pcmp->voices == 1) {
459  if (pcmp->pvoices[1]) {
460  snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[1]);
461  pcmp->pvoices[1] = NULL;
462  }
463  }
464  return 0;
465 }
466 
467 static int snd_gf1_pcm_playback_hw_free(struct snd_pcm_substream *substream)
468 {
469  struct snd_pcm_runtime *runtime = substream->runtime;
470  struct gus_pcm_private *pcmp = runtime->private_data;
471 
472  snd_pcm_lib_free_pages(substream);
473  if (pcmp->pvoices[0]) {
474  snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[0]);
475  pcmp->pvoices[0] = NULL;
476  }
477  if (pcmp->pvoices[1]) {
478  snd_gf1_free_voice(pcmp->gus, pcmp->pvoices[1]);
479  pcmp->pvoices[1] = NULL;
480  }
481  if (pcmp->memory > 0) {
482  snd_gf1_mem_free(&pcmp->gus->gf1.mem_alloc, pcmp->memory);
483  pcmp->memory = 0;
484  }
485  return 0;
486 }
487 
488 static int snd_gf1_pcm_playback_prepare(struct snd_pcm_substream *substream)
489 {
490  struct snd_pcm_runtime *runtime = substream->runtime;
491  struct gus_pcm_private *pcmp = runtime->private_data;
492 
493  pcmp->bpos = 0;
494  pcmp->dma_size = snd_pcm_lib_buffer_bytes(substream);
495  pcmp->block_size = snd_pcm_lib_period_bytes(substream);
496  pcmp->blocks = pcmp->dma_size / pcmp->block_size;
497  return 0;
498 }
499 
500 static int snd_gf1_pcm_playback_trigger(struct snd_pcm_substream *substream,
501  int cmd)
502 {
503  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
504  struct snd_pcm_runtime *runtime = substream->runtime;
505  struct gus_pcm_private *pcmp = runtime->private_data;
506  int voice;
507 
508  if (cmd == SNDRV_PCM_TRIGGER_START) {
509  snd_gf1_pcm_trigger_up(substream);
510  } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
511  spin_lock(&pcmp->lock);
512  pcmp->flags &= ~SNDRV_GF1_PCM_PFLG_ACTIVE;
513  spin_unlock(&pcmp->lock);
514  voice = pcmp->pvoices[0]->number;
515  snd_gf1_stop_voices(gus, voice, voice);
516  if (pcmp->pvoices[1]) {
517  voice = pcmp->pvoices[1]->number;
518  snd_gf1_stop_voices(gus, voice, voice);
519  }
520  } else {
521  return -EINVAL;
522  }
523  return 0;
524 }
525 
526 static snd_pcm_uframes_t snd_gf1_pcm_playback_pointer(struct snd_pcm_substream *substream)
527 {
528  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
529  struct snd_pcm_runtime *runtime = substream->runtime;
530  struct gus_pcm_private *pcmp = runtime->private_data;
531  unsigned int pos;
532  unsigned char voice_ctrl;
533 
534  pos = 0;
535  spin_lock(&gus->reg_lock);
536  if (pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE) {
537  snd_gf1_select_voice(gus, pcmp->pvoices[0]->number);
538  voice_ctrl = snd_gf1_read8(gus, SNDRV_GF1_VB_ADDRESS_CONTROL);
539  pos = (snd_gf1_read_addr(gus, SNDRV_GF1_VA_CURRENT, voice_ctrl & 4) >> 4) - pcmp->memory;
540  if (substream->runtime->channels > 1)
541  pos <<= 1;
542  pos = bytes_to_frames(runtime, pos);
543  }
544  spin_unlock(&gus->reg_lock);
545  return pos;
546 }
547 
548 static struct snd_ratnum clock = {
549  .num = 9878400/16,
550  .den_min = 2,
551  .den_max = 257,
552  .den_step = 1,
553 };
554 
555 static struct snd_pcm_hw_constraint_ratnums hw_constraints_clocks = {
556  .nrats = 1,
557  .rats = &clock,
558 };
559 
560 static int snd_gf1_pcm_capture_hw_params(struct snd_pcm_substream *substream,
561  struct snd_pcm_hw_params *hw_params)
562 {
563  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
564 
565  gus->c_dma_size = params_buffer_bytes(hw_params);
566  gus->c_period_size = params_period_bytes(hw_params);
567  gus->c_pos = 0;
568  gus->gf1.pcm_rcntrl_reg = 0x21; /* IRQ at end, enable & start */
569  if (params_channels(hw_params) > 1)
570  gus->gf1.pcm_rcntrl_reg |= 2;
571  if (gus->gf1.dma2 > 3)
572  gus->gf1.pcm_rcntrl_reg |= 4;
573  if (snd_pcm_format_unsigned(params_format(hw_params)))
574  gus->gf1.pcm_rcntrl_reg |= 0x80;
575  return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
576 }
577 
578 static int snd_gf1_pcm_capture_hw_free(struct snd_pcm_substream *substream)
579 {
580  return snd_pcm_lib_free_pages(substream);
581 }
582 
583 static int snd_gf1_pcm_capture_prepare(struct snd_pcm_substream *substream)
584 {
585  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
586  struct snd_pcm_runtime *runtime = substream->runtime;
587 
588  snd_gf1_i_write8(gus, SNDRV_GF1_GB_RECORD_RATE, runtime->rate_den - 2);
589  snd_gf1_i_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, 0); /* disable sampling */
590  snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL); /* Sampling Control Register */
591  snd_dma_program(gus->gf1.dma2, runtime->dma_addr, gus->c_period_size, DMA_MODE_READ);
592  return 0;
593 }
594 
595 static int snd_gf1_pcm_capture_trigger(struct snd_pcm_substream *substream,
596  int cmd)
597 {
598  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
599  int val;
600 
601  if (cmd == SNDRV_PCM_TRIGGER_START) {
602  val = gus->gf1.pcm_rcntrl_reg;
603  } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
604  val = 0;
605  } else {
606  return -EINVAL;
607  }
608 
609  spin_lock(&gus->reg_lock);
610  snd_gf1_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, val);
611  snd_gf1_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL);
612  spin_unlock(&gus->reg_lock);
613  return 0;
614 }
615 
616 static snd_pcm_uframes_t snd_gf1_pcm_capture_pointer(struct snd_pcm_substream *substream)
617 {
618  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
619  int pos = snd_dma_pointer(gus->gf1.dma2, gus->c_period_size);
620  pos = bytes_to_frames(substream->runtime, (gus->c_pos + pos) % gus->c_dma_size);
621  return pos;
622 }
623 
624 static void snd_gf1_pcm_interrupt_dma_read(struct snd_gus_card * gus)
625 {
626  snd_gf1_i_write8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL, 0); /* disable sampling */
627  snd_gf1_i_look8(gus, SNDRV_GF1_GB_REC_DMA_CONTROL); /* Sampling Control Register */
628  if (gus->pcm_cap_substream != NULL) {
629  snd_gf1_pcm_capture_prepare(gus->pcm_cap_substream);
630  snd_gf1_pcm_capture_trigger(gus->pcm_cap_substream, SNDRV_PCM_TRIGGER_START);
631  gus->c_pos += gus->c_period_size;
632  snd_pcm_period_elapsed(gus->pcm_cap_substream);
633  }
634 }
635 
636 static struct snd_pcm_hardware snd_gf1_pcm_playback =
637 {
638  .info = SNDRV_PCM_INFO_NONINTERLEAVED,
639  .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
640  SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
641  .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
642  .rate_min = 5510,
643  .rate_max = 48000,
644  .channels_min = 1,
645  .channels_max = 2,
646  .buffer_bytes_max = (128*1024),
647  .period_bytes_min = 64,
648  .period_bytes_max = (128*1024),
649  .periods_min = 1,
650  .periods_max = 1024,
651  .fifo_size = 0,
652 };
653 
654 static struct snd_pcm_hardware snd_gf1_pcm_capture =
655 {
656  .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
657  SNDRV_PCM_INFO_MMAP_VALID),
658  .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8,
659  .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_44100,
660  .rate_min = 5510,
661  .rate_max = 44100,
662  .channels_min = 1,
663  .channels_max = 2,
664  .buffer_bytes_max = (128*1024),
665  .period_bytes_min = 64,
666  .period_bytes_max = (128*1024),
667  .periods_min = 1,
668  .periods_max = 1024,
669  .fifo_size = 0,
670 };
671 
672 static void snd_gf1_pcm_playback_free(struct snd_pcm_runtime *runtime)
673 {
674  kfree(runtime->private_data);
675 }
676 
677 static int snd_gf1_pcm_playback_open(struct snd_pcm_substream *substream)
678 {
679  struct gus_pcm_private *pcmp;
680  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
681  struct snd_pcm_runtime *runtime = substream->runtime;
682  int err;
683 
684  pcmp = kzalloc(sizeof(*pcmp), GFP_KERNEL);
685  if (pcmp == NULL)
686  return -ENOMEM;
687  pcmp->gus = gus;
688  spin_lock_init(&pcmp->lock);
689  init_waitqueue_head(&pcmp->sleep);
690  atomic_set(&pcmp->dma_count, 0);
691 
692  runtime->private_data = pcmp;
693  runtime->private_free = snd_gf1_pcm_playback_free;
694 
695 #if 0
696  printk(KERN_DEBUG "playback.buffer = 0x%lx, gf1.pcm_buffer = 0x%lx\n",
697  (long) pcm->playback.buffer, (long) gus->gf1.pcm_buffer);
698 #endif
699  if ((err = snd_gf1_dma_init(gus)) < 0)
700  return err;
701  pcmp->flags = SNDRV_GF1_PCM_PFLG_NONE;
702  pcmp->substream = substream;
703  runtime->hw = snd_gf1_pcm_playback;
704  snd_pcm_limit_isa_dma_size(gus->gf1.dma1, &runtime->hw.buffer_bytes_max);
705  snd_pcm_limit_isa_dma_size(gus->gf1.dma1, &runtime->hw.period_bytes_max);
706  snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64);
707  return 0;
708 }
709 
710 static int snd_gf1_pcm_playback_close(struct snd_pcm_substream *substream)
711 {
712  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
713  struct snd_pcm_runtime *runtime = substream->runtime;
714  struct gus_pcm_private *pcmp = runtime->private_data;
715 
716  if (!wait_event_timeout(pcmp->sleep, (atomic_read(&pcmp->dma_count) <= 0), 2*HZ))
717  snd_printk(KERN_ERR "gf1 pcm - serious DMA problem\n");
718 
719  snd_gf1_dma_done(gus);
720  return 0;
721 }
722 
723 static int snd_gf1_pcm_capture_open(struct snd_pcm_substream *substream)
724 {
725  struct snd_pcm_runtime *runtime = substream->runtime;
726  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
727 
728  gus->gf1.interrupt_handler_dma_read = snd_gf1_pcm_interrupt_dma_read;
729  gus->pcm_cap_substream = substream;
730  substream->runtime->hw = snd_gf1_pcm_capture;
731  snd_pcm_limit_isa_dma_size(gus->gf1.dma2, &runtime->hw.buffer_bytes_max);
732  snd_pcm_limit_isa_dma_size(gus->gf1.dma2, &runtime->hw.period_bytes_max);
733  snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
734  &hw_constraints_clocks);
735  return 0;
736 }
737 
738 static int snd_gf1_pcm_capture_close(struct snd_pcm_substream *substream)
739 {
740  struct snd_gus_card *gus = snd_pcm_substream_chip(substream);
741 
742  gus->pcm_cap_substream = NULL;
743  snd_gf1_set_default_handlers(gus, SNDRV_GF1_HANDLER_DMA_READ);
744  return 0;
745 }
746 
747 static int snd_gf1_pcm_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
748 {
749  uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
750  uinfo->count = 2;
751  uinfo->value.integer.min = 0;
752  uinfo->value.integer.max = 127;
753  return 0;
754 }
755 
756 static int snd_gf1_pcm_volume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
757 {
758  struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
759  unsigned long flags;
760 
761  spin_lock_irqsave(&gus->pcm_volume_level_lock, flags);
762  ucontrol->value.integer.value[0] = gus->gf1.pcm_volume_level_left1;
763  ucontrol->value.integer.value[1] = gus->gf1.pcm_volume_level_right1;
764  spin_unlock_irqrestore(&gus->pcm_volume_level_lock, flags);
765  return 0;
766 }
767 
768 static int snd_gf1_pcm_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
769 {
770  struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
771  unsigned long flags;
772  int change;
773  unsigned int idx;
774  unsigned short val1, val2, vol;
775  struct gus_pcm_private *pcmp;
776  struct snd_gus_voice *pvoice;
777 
778  val1 = ucontrol->value.integer.value[0] & 127;
779  val2 = ucontrol->value.integer.value[1] & 127;
780  spin_lock_irqsave(&gus->pcm_volume_level_lock, flags);
781  change = val1 != gus->gf1.pcm_volume_level_left1 ||
782  val2 != gus->gf1.pcm_volume_level_right1;
783  gus->gf1.pcm_volume_level_left1 = val1;
784  gus->gf1.pcm_volume_level_right1 = val2;
785  gus->gf1.pcm_volume_level_left = snd_gf1_lvol_to_gvol_raw(val1 << 9) << 4;
786  gus->gf1.pcm_volume_level_right = snd_gf1_lvol_to_gvol_raw(val2 << 9) << 4;
787  spin_unlock_irqrestore(&gus->pcm_volume_level_lock, flags);
788  /* are we active? */
789  spin_lock_irqsave(&gus->voice_alloc, flags);
790  for (idx = 0; idx < 32; idx++) {
791  pvoice = &gus->gf1.voices[idx];
792  if (!pvoice->pcm)
793  continue;
794  pcmp = pvoice->private_data;
795  if (!(pcmp->flags & SNDRV_GF1_PCM_PFLG_ACTIVE))
796  continue;
797  /* load real volume - better precision */
798  spin_lock(&gus->reg_lock);
799  snd_gf1_select_voice(gus, pvoice->number);
800  snd_gf1_ctrl_stop(gus, SNDRV_GF1_VB_VOLUME_CONTROL);
801  vol = pvoice == pcmp->pvoices[0] ? gus->gf1.pcm_volume_level_left : gus->gf1.pcm_volume_level_right;
802  snd_gf1_write16(gus, SNDRV_GF1_VW_VOLUME, vol);
803  pcmp->final_volume = 1;
804  spin_unlock(&gus->reg_lock);
805  }
806  spin_unlock_irqrestore(&gus->voice_alloc, flags);
807  return change;
808 }
809 
810 static struct snd_kcontrol_new snd_gf1_pcm_volume_control =
811 {
812  .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
813  .name = "PCM Playback Volume",
814  .info = snd_gf1_pcm_volume_info,
815  .get = snd_gf1_pcm_volume_get,
816  .put = snd_gf1_pcm_volume_put
817 };
818 
819 static struct snd_kcontrol_new snd_gf1_pcm_volume_control1 =
820 {
821  .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
822  .name = "GPCM Playback Volume",
823  .info = snd_gf1_pcm_volume_info,
824  .get = snd_gf1_pcm_volume_get,
825  .put = snd_gf1_pcm_volume_put
826 };
827 
828 static struct snd_pcm_ops snd_gf1_pcm_playback_ops = {
829  .open = snd_gf1_pcm_playback_open,
830  .close = snd_gf1_pcm_playback_close,
831  .ioctl = snd_pcm_lib_ioctl,
832  .hw_params = snd_gf1_pcm_playback_hw_params,
833  .hw_free = snd_gf1_pcm_playback_hw_free,
834  .prepare = snd_gf1_pcm_playback_prepare,
835  .trigger = snd_gf1_pcm_playback_trigger,
836  .pointer = snd_gf1_pcm_playback_pointer,
837  .copy = snd_gf1_pcm_playback_copy,
838  .silence = snd_gf1_pcm_playback_silence,
839 };
840 
841 static struct snd_pcm_ops snd_gf1_pcm_capture_ops = {
842  .open = snd_gf1_pcm_capture_open,
843  .close = snd_gf1_pcm_capture_close,
844  .ioctl = snd_pcm_lib_ioctl,
845  .hw_params = snd_gf1_pcm_capture_hw_params,
846  .hw_free = snd_gf1_pcm_capture_hw_free,
847  .prepare = snd_gf1_pcm_capture_prepare,
848  .trigger = snd_gf1_pcm_capture_trigger,
849  .pointer = snd_gf1_pcm_capture_pointer,
850 };
851 
852 int snd_gf1_pcm_new(struct snd_gus_card * gus, int pcm_dev, int control_index, struct snd_pcm ** rpcm)
853 {
854  struct snd_card *card;
855  struct snd_kcontrol *kctl;
856  struct snd_pcm *pcm;
857  struct snd_pcm_substream *substream;
858  int capture, err;
859 
860  if (rpcm)
861  *rpcm = NULL;
862  card = gus->card;
863  capture = !gus->interwave && !gus->ess_flag && !gus->ace_flag ? 1 : 0;
864  err = snd_pcm_new(card,
865  gus->interwave ? "AMD InterWave" : "GF1",
866  pcm_dev,
867  gus->gf1.pcm_channels / 2,
868  capture,
869  &pcm);
870  if (err < 0)
871  return err;
872  pcm->private_data = gus;
873  /* playback setup */
874  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_gf1_pcm_playback_ops);
875 
876  for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
877  snd_pcm_lib_preallocate_pages(substream, SNDRV_DMA_TYPE_DEV,
878  snd_dma_isa_data(),
879  64*1024, gus->gf1.dma1 > 3 ? 128*1024 : 64*1024);
880 
881  pcm->info_flags = 0;
882  pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
883  if (capture) {
884  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_gf1_pcm_capture_ops);
885  if (gus->gf1.dma2 == gus->gf1.dma1)
886  pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX;
887  snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
888  SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(),
889  64*1024, gus->gf1.dma2 > 3 ? 128*1024 : 64*1024);
890  }
891  strcpy(pcm->name, pcm->id);
892  if (gus->interwave) {
893  sprintf(pcm->name + strlen(pcm->name), " rev %c", gus->revision + 'A');
894  }
895  strcat(pcm->name, " (synth)");
896  gus->pcm = pcm;
897 
898  if (gus->codec_flag)
899  kctl = snd_ctl_new1(&snd_gf1_pcm_volume_control1, gus);
900  else
901  kctl = snd_ctl_new1(&snd_gf1_pcm_volume_control, gus);
902  if ((err = snd_ctl_add(card, kctl)) < 0)
903  return err;
904  kctl->id.index = control_index;
905 
906  if (rpcm)
907  *rpcm = pcm;
908  return 0;
909 }
910 
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