[ALSA] Clean up PCM codes (take 2)
[linux-3.10.git] / sound / core / oss / pcm_oss.c
1 /*
2  *  Digital Audio (PCM) abstract layer / OSS compatible
3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4  *
5  *
6  *   This program is free software; you can redistribute it and/or modify
7  *   it under the terms of the GNU General Public License as published by
8  *   the Free Software Foundation; either version 2 of the License, or
9  *   (at your option) any later version.
10  *
11  *   This program is distributed in the hope that it will be useful,
12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *   GNU General Public License for more details.
15  *
16  *   You should have received a copy of the GNU General Public License
17  *   along with this program; if not, write to the Free Software
18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19  *
20  */
21
22 #if 0
23 #define PLUGIN_DEBUG
24 #endif
25 #if 0
26 #define OSS_DEBUG
27 #endif
28
29 #include <sound/driver.h>
30 #include <linux/init.h>
31 #include <linux/smp_lock.h>
32 #include <linux/slab.h>
33 #include <linux/time.h>
34 #include <linux/vmalloc.h>
35 #include <linux/moduleparam.h>
36 #include <linux/string.h>
37 #include <sound/core.h>
38 #include <sound/minors.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
41 #include "pcm_plugin.h"
42 #include <sound/info.h>
43 #include <linux/soundcard.h>
44 #include <sound/initval.h>
45
46 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
47
48 static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
50 static int nonblock_open = 1;
51
52 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
54 MODULE_LICENSE("GPL");
55 module_param_array(dsp_map, int, NULL, 0444);
56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
57 module_param_array(adsp_map, int, NULL, 0444);
58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
59 module_param(nonblock_open, bool, 0644);
60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
63
64 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
65 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
66 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
67 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
68
69 static inline mm_segment_t snd_enter_user(void)
70 {
71         mm_segment_t fs = get_fs();
72         set_fs(get_ds());
73         return fs;
74 }
75
76 static inline void snd_leave_user(mm_segment_t fs)
77 {
78         set_fs(fs);
79 }
80
81 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
82 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
83 {
84         struct snd_pcm_runtime *runtime = substream->runtime;
85         struct snd_pcm_plugin *plugin, *next;
86         
87         plugin = runtime->oss.plugin_first;
88         while (plugin) {
89                 next = plugin->next;
90                 snd_pcm_plugin_free(plugin);
91                 plugin = next;
92         }
93         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
94         return 0;
95 }
96
97 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
98 {
99         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
100         plugin->next = runtime->oss.plugin_first;
101         plugin->prev = NULL;
102         if (runtime->oss.plugin_first) {
103                 runtime->oss.plugin_first->prev = plugin;
104                 runtime->oss.plugin_first = plugin;
105         } else {
106                 runtime->oss.plugin_last =
107                 runtime->oss.plugin_first = plugin;
108         }
109         return 0;
110 }
111
112 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
113 {
114         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
115         plugin->next = NULL;
116         plugin->prev = runtime->oss.plugin_last;
117         if (runtime->oss.plugin_last) {
118                 runtime->oss.plugin_last->next = plugin;
119                 runtime->oss.plugin_last = plugin;
120         } else {
121                 runtime->oss.plugin_last =
122                 runtime->oss.plugin_first = plugin;
123         }
124         return 0;
125 }
126 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
127
128 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
129 {
130         struct snd_pcm_runtime *runtime = substream->runtime;
131         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
132         long bytes = frames_to_bytes(runtime, frames);
133         if (buffer_size == runtime->oss.buffer_bytes)
134                 return bytes;
135 #if BITS_PER_LONG >= 64
136         return runtime->oss.buffer_bytes * bytes / buffer_size;
137 #else
138         {
139                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
140                 u32 rem;
141                 div64_32(&bsize, buffer_size, &rem);
142                 return (long)bsize;
143         }
144 #endif
145 }
146
147 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
148 {
149         struct snd_pcm_runtime *runtime = substream->runtime;
150         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
151         if (buffer_size == runtime->oss.buffer_bytes)
152                 return bytes_to_frames(runtime, bytes);
153         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
154 }
155
156 static int snd_pcm_oss_format_from(int format)
157 {
158         switch (format) {
159         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
160         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
161         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
162         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
163         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
164         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
165         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
166         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
167         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
168         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
169         default:                return SNDRV_PCM_FORMAT_U8;
170         }
171 }
172
173 static int snd_pcm_oss_format_to(int format)
174 {
175         switch (format) {
176         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
177         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
178         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
179         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
180         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
181         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
182         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
183         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
184         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
185         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
186         default:                        return -EINVAL;
187         }
188 }
189
190 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 
191                                    struct snd_pcm_hw_params *oss_params,
192                                    struct snd_pcm_hw_params *slave_params)
193 {
194         size_t s;
195         size_t oss_buffer_size, oss_period_size, oss_periods;
196         size_t min_period_size, max_period_size;
197         struct snd_pcm_runtime *runtime = substream->runtime;
198         size_t oss_frame_size;
199
200         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
201                          params_channels(oss_params) / 8;
202
203         oss_buffer_size = snd_pcm_plug_client_size(substream,
204                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
205         oss_buffer_size = 1 << ld2(oss_buffer_size);
206         if (atomic_read(&runtime->mmap_count)) {
207                 if (oss_buffer_size > runtime->oss.mmap_bytes)
208                         oss_buffer_size = runtime->oss.mmap_bytes;
209         }
210
211         if (substream->oss.setup &&
212             substream->oss.setup->period_size > 16)
213                 oss_period_size = substream->oss.setup->period_size;
214         else if (runtime->oss.fragshift) {
215                 oss_period_size = 1 << runtime->oss.fragshift;
216                 if (oss_period_size > oss_buffer_size / 2)
217                         oss_period_size = oss_buffer_size / 2;
218         } else {
219                 int sd;
220                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
221
222                 oss_period_size = oss_buffer_size;
223                 do {
224                         oss_period_size /= 2;
225                 } while (oss_period_size > bytes_per_sec);
226                 if (runtime->oss.subdivision == 0) {
227                         sd = 4;
228                         if (oss_period_size / sd > 4096)
229                                 sd *= 2;
230                         if (oss_period_size / sd < 4096)
231                                 sd = 1;
232                 } else
233                         sd = runtime->oss.subdivision;
234                 oss_period_size /= sd;
235                 if (oss_period_size < 16)
236                         oss_period_size = 16;
237         }
238
239         min_period_size = snd_pcm_plug_client_size(substream,
240                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
241         min_period_size *= oss_frame_size;
242         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
243         if (oss_period_size < min_period_size)
244                 oss_period_size = min_period_size;
245
246         max_period_size = snd_pcm_plug_client_size(substream,
247                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
248         max_period_size *= oss_frame_size;
249         max_period_size = 1 << ld2(max_period_size);
250         if (oss_period_size > max_period_size)
251                 oss_period_size = max_period_size;
252
253         oss_periods = oss_buffer_size / oss_period_size;
254
255         if (substream->oss.setup) {
256                 if (substream->oss.setup->periods > 1)
257                         oss_periods = substream->oss.setup->periods;
258         }
259
260         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
261         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
262                 s = runtime->oss.maxfrags;
263         if (oss_periods > s)
264                 oss_periods = s;
265
266         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
267         if (s < 2)
268                 s = 2;
269         if (oss_periods < s)
270                 oss_periods = s;
271
272         while (oss_period_size * oss_periods > oss_buffer_size)
273                 oss_period_size /= 2;
274
275         snd_assert(oss_period_size >= 16, return -EINVAL);
276         runtime->oss.period_bytes = oss_period_size;
277         runtime->oss.period_frames = 1;
278         runtime->oss.periods = oss_periods;
279         return 0;
280 }
281
282 static int choose_rate(struct snd_pcm_substream *substream,
283                        struct snd_pcm_hw_params *params, unsigned int best_rate)
284 {
285         struct snd_interval *it;
286         struct snd_pcm_hw_params *save;
287         unsigned int rate, prev;
288
289         save = kmalloc(sizeof(*save), GFP_KERNEL);
290         if (save == NULL)
291                 return -ENOMEM;
292         *save = *params;
293         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
294
295         /* try multiples of the best rate */
296         rate = best_rate;
297         for (;;) {
298                 if (it->max < rate || (it->max == rate && it->openmax))
299                         break;
300                 if (it->min < rate || (it->min == rate && !it->openmin)) {
301                         int ret;
302                         ret = snd_pcm_hw_param_set(substream, params,
303                                                    SNDRV_PCM_HW_PARAM_RATE,
304                                                    rate, 0);
305                         if (ret == (int)rate) {
306                                 kfree(save);
307                                 return rate;
308                         }
309                         *params = *save;
310                 }
311                 prev = rate;
312                 rate += best_rate;
313                 if (rate <= prev)
314                         break;
315         }
316
317         /* not found, use the nearest rate */
318         kfree(save);
319         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
320 }
321
322 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
323 {
324         struct snd_pcm_runtime *runtime = substream->runtime;
325         struct snd_pcm_hw_params *params, *sparams;
326         struct snd_pcm_sw_params *sw_params;
327         ssize_t oss_buffer_size, oss_period_size;
328         size_t oss_frame_size;
329         int err;
330         int direct;
331         int format, sformat, n;
332         struct snd_mask sformat_mask;
333         struct snd_mask mask;
334
335         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
336         params = kmalloc(sizeof(*params), GFP_KERNEL);
337         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
338         if (!sw_params || !params || !sparams) {
339                 snd_printd("No memory\n");
340                 err = -ENOMEM;
341                 goto failure;
342         }
343
344         if (atomic_read(&runtime->mmap_count)) {
345                 direct = 1;
346         } else {
347                 struct snd_pcm_oss_setup *setup = substream->oss.setup;
348                 direct = (setup != NULL && setup->direct);
349         }
350
351         _snd_pcm_hw_params_any(sparams);
352         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
353         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
354         snd_mask_none(&mask);
355         if (atomic_read(&runtime->mmap_count))
356                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
357         else {
358                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
359                 if (!direct)
360                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
361         }
362         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
363         if (err < 0) {
364                 snd_printd("No usable accesses\n");
365                 err = -EINVAL;
366                 goto failure;
367         }
368         choose_rate(substream, sparams, runtime->oss.rate);
369         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
370
371         format = snd_pcm_oss_format_from(runtime->oss.format);
372
373         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
374         if (direct)
375                 sformat = format;
376         else
377                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
378
379         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
380                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
381                         if (snd_mask_test(&sformat_mask, sformat) &&
382                             snd_pcm_oss_format_to(sformat) >= 0)
383                                 break;
384                 }
385                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
386                         snd_printd("Cannot find a format!!!\n");
387                         err = -EINVAL;
388                         goto failure;
389                 }
390         }
391         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
392         snd_assert(err >= 0, goto failure);
393
394         if (direct) {
395                 memcpy(params, sparams, sizeof(*params));
396         } else {
397                 _snd_pcm_hw_params_any(params);
398                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
399                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
400                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
401                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
402                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
403                                       runtime->oss.channels, 0);
404                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
405                                       runtime->oss.rate, 0);
406                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
407                          params_access(params), params_format(params),
408                          params_channels(params), params_rate(params));
409         }
410         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
411                  params_access(sparams), params_format(sparams),
412                  params_channels(sparams), params_rate(sparams));
413
414         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
415                          params_channels(params) / 8;
416
417 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
418         snd_pcm_oss_plugin_clear(substream);
419         if (!direct) {
420                 /* add necessary plugins */
421                 snd_pcm_oss_plugin_clear(substream);
422                 if ((err = snd_pcm_plug_format_plugins(substream,
423                                                        params, 
424                                                        sparams)) < 0) {
425                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
426                         snd_pcm_oss_plugin_clear(substream);
427                         goto failure;
428                 }
429                 if (runtime->oss.plugin_first) {
430                         struct snd_pcm_plugin *plugin;
431                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
432                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
433                                 snd_pcm_oss_plugin_clear(substream);
434                                 goto failure;
435                         }
436                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
437                                 err = snd_pcm_plugin_append(plugin);
438                         } else {
439                                 err = snd_pcm_plugin_insert(plugin);
440                         }
441                         if (err < 0) {
442                                 snd_pcm_oss_plugin_clear(substream);
443                                 goto failure;
444                         }
445                 }
446         }
447 #endif
448
449         err = snd_pcm_oss_period_size(substream, params, sparams);
450         if (err < 0)
451                 goto failure;
452
453         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
454         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
455         snd_assert(err >= 0, goto failure);
456
457         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
458                                      runtime->oss.periods, NULL);
459         snd_assert(err >= 0, goto failure);
460
461         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
462
463         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
464                 snd_printd("HW_PARAMS failed: %i\n", err);
465                 goto failure;
466         }
467
468         memset(sw_params, 0, sizeof(*sw_params));
469         if (runtime->oss.trigger) {
470                 sw_params->start_threshold = 1;
471         } else {
472                 sw_params->start_threshold = runtime->boundary;
473         }
474         if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
475                 sw_params->stop_threshold = runtime->boundary;
476         else
477                 sw_params->stop_threshold = runtime->buffer_size;
478         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
479         sw_params->period_step = 1;
480         sw_params->sleep_min = 0;
481         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
482                 1 : runtime->period_size;
483         sw_params->xfer_align = 1;
484         if (atomic_read(&runtime->mmap_count) ||
485             (substream->oss.setup && substream->oss.setup->nosilence)) {
486                 sw_params->silence_threshold = 0;
487                 sw_params->silence_size = 0;
488         } else {
489                 snd_pcm_uframes_t frames;
490                 frames = runtime->period_size + 16;
491                 if (frames > runtime->buffer_size)
492                         frames = runtime->buffer_size;
493                 sw_params->silence_threshold = frames;
494                 sw_params->silence_size = frames;
495         }
496
497         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
498                 snd_printd("SW_PARAMS failed: %i\n", err);
499                 goto failure;
500         }
501
502         runtime->oss.periods = params_periods(sparams);
503         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
504         snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
505 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
506         if (runtime->oss.plugin_first) {
507                 err = snd_pcm_plug_alloc(substream, oss_period_size);
508                 if (err < 0)
509                         goto failure;
510         }
511 #endif
512         oss_period_size *= oss_frame_size;
513
514         oss_buffer_size = oss_period_size * runtime->oss.periods;
515         snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
516
517         runtime->oss.period_bytes = oss_period_size;
518         runtime->oss.buffer_bytes = oss_buffer_size;
519
520         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
521                  runtime->oss.period_bytes,
522                  runtime->oss.buffer_bytes);
523         pdprintf("slave: period_size = %i, buffer_size = %i\n",
524                  params_period_size(sparams),
525                  params_buffer_size(sparams));
526
527         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
528         runtime->oss.channels = params_channels(params);
529         runtime->oss.rate = params_rate(params);
530
531         runtime->oss.params = 0;
532         runtime->oss.prepare = 1;
533         vfree(runtime->oss.buffer);
534         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
535         runtime->oss.buffer_used = 0;
536         if (runtime->dma_area)
537                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
538
539         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
540
541         err = 0;
542 failure:
543         kfree(sw_params);
544         kfree(params);
545         kfree(sparams);
546         return err;
547 }
548
549 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
550 {
551         int idx, err;
552         struct snd_pcm_substream *asubstream = NULL, *substream;
553
554         for (idx = 0; idx < 2; idx++) {
555                 substream = pcm_oss_file->streams[idx];
556                 if (substream == NULL)
557                         continue;
558                 if (asubstream == NULL)
559                         asubstream = substream;
560                 if (substream->runtime->oss.params) {
561                         err = snd_pcm_oss_change_params(substream);
562                         if (err < 0)
563                                 return err;
564                 }
565         }
566         snd_assert(asubstream != NULL, return -EIO);
567         if (r_substream)
568                 *r_substream = asubstream;
569         return 0;
570 }
571
572 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
573 {
574         int err;
575         struct snd_pcm_runtime *runtime = substream->runtime;
576
577         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
578         if (err < 0) {
579                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
580                 return err;
581         }
582         runtime->oss.prepare = 0;
583         runtime->oss.prev_hw_ptr_interrupt = 0;
584         runtime->oss.period_ptr = 0;
585         runtime->oss.buffer_used = 0;
586
587         return 0;
588 }
589
590 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
591 {
592         struct snd_pcm_runtime *runtime;
593         int err;
594
595         if (substream == NULL)
596                 return 0;
597         runtime = substream->runtime;
598         if (runtime->oss.params) {
599                 err = snd_pcm_oss_change_params(substream);
600                 if (err < 0)
601                         return err;
602         }
603         if (runtime->oss.prepare) {
604                 err = snd_pcm_oss_prepare(substream);
605                 if (err < 0)
606                         return err;
607         }
608         return 0;
609 }
610
611 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
612 {
613         struct snd_pcm_runtime *runtime;
614         snd_pcm_uframes_t frames;
615         int err = 0;
616
617         while (1) {
618                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
619                 if (err < 0)
620                         break;
621                 runtime = substream->runtime;
622                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
623                         break;
624                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
625                 /* until avail(delay) <= buffer_size */
626                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
627                 frames /= runtime->period_size;
628                 frames *= runtime->period_size;
629                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
630                 if (err < 0)
631                         break;
632         }
633         return err;
634 }
635
636 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
637 {
638         struct snd_pcm_runtime *runtime = substream->runtime;
639         int ret;
640         while (1) {
641                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
642                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
643 #ifdef OSS_DEBUG
644                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
645                                 printk("pcm_oss: write: recovering from XRUN\n");
646                         else
647                                 printk("pcm_oss: write: recovering from SUSPEND\n");
648 #endif
649                         ret = snd_pcm_oss_prepare(substream);
650                         if (ret < 0)
651                                 break;
652                 }
653                 if (in_kernel) {
654                         mm_segment_t fs;
655                         fs = snd_enter_user();
656                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
657                         snd_leave_user(fs);
658                 } else {
659                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
660                 }
661                 if (ret != -EPIPE && ret != -ESTRPIPE)
662                         break;
663                 /* test, if we can't store new data, because the stream */
664                 /* has not been started */
665                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
666                         return -EAGAIN;
667         }
668         return ret;
669 }
670
671 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
672 {
673         struct snd_pcm_runtime *runtime = substream->runtime;
674         snd_pcm_sframes_t delay;
675         int ret;
676         while (1) {
677                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
678                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
679 #ifdef OSS_DEBUG
680                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
681                                 printk("pcm_oss: read: recovering from XRUN\n");
682                         else
683                                 printk("pcm_oss: read: recovering from SUSPEND\n");
684 #endif
685                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
686                         if (ret < 0)
687                                 break;
688                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
689                         ret = snd_pcm_oss_prepare(substream);
690                         if (ret < 0)
691                                 break;
692                 }
693                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
694                 if (ret < 0)
695                         break;
696                 if (in_kernel) {
697                         mm_segment_t fs;
698                         fs = snd_enter_user();
699                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
700                         snd_leave_user(fs);
701                 } else {
702                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
703                 }
704                 if (ret == -EPIPE) {
705                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
706                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
707                                 if (ret < 0)
708                                         break;
709                         }
710                         continue;
711                 }
712                 if (ret != -ESTRPIPE)
713                         break;
714         }
715         return ret;
716 }
717
718 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
719 {
720         struct snd_pcm_runtime *runtime = substream->runtime;
721         int ret;
722         while (1) {
723                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
724                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
725 #ifdef OSS_DEBUG
726                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
727                                 printk("pcm_oss: writev: recovering from XRUN\n");
728                         else
729                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
730 #endif
731                         ret = snd_pcm_oss_prepare(substream);
732                         if (ret < 0)
733                                 break;
734                 }
735                 if (in_kernel) {
736                         mm_segment_t fs;
737                         fs = snd_enter_user();
738                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
739                         snd_leave_user(fs);
740                 } else {
741                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
742                 }
743                 if (ret != -EPIPE && ret != -ESTRPIPE)
744                         break;
745
746                 /* test, if we can't store new data, because the stream */
747                 /* has not been started */
748                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
749                         return -EAGAIN;
750         }
751         return ret;
752 }
753         
754 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
755 {
756         struct snd_pcm_runtime *runtime = substream->runtime;
757         int ret;
758         while (1) {
759                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
760                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
761 #ifdef OSS_DEBUG
762                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
763                                 printk("pcm_oss: readv: recovering from XRUN\n");
764                         else
765                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
766 #endif
767                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
768                         if (ret < 0)
769                                 break;
770                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
771                         ret = snd_pcm_oss_prepare(substream);
772                         if (ret < 0)
773                                 break;
774                 }
775                 if (in_kernel) {
776                         mm_segment_t fs;
777                         fs = snd_enter_user();
778                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
779                         snd_leave_user(fs);
780                 } else {
781                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
782                 }
783                 if (ret != -EPIPE && ret != -ESTRPIPE)
784                         break;
785         }
786         return ret;
787 }
788
789 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
790 {
791         struct snd_pcm_runtime *runtime = substream->runtime;
792         snd_pcm_sframes_t frames, frames1;
793 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
794         if (runtime->oss.plugin_first) {
795                 struct snd_pcm_plugin_channel *channels;
796                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
797                 if (!in_kernel) {
798                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
799                                 return -EFAULT;
800                         buf = runtime->oss.buffer;
801                 }
802                 frames = bytes / oss_frame_bytes;
803                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
804                 if (frames1 < 0)
805                         return frames1;
806                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
807                 if (frames1 <= 0)
808                         return frames1;
809                 bytes = frames1 * oss_frame_bytes;
810         } else
811 #endif
812         {
813                 frames = bytes_to_frames(runtime, bytes);
814                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
815                 if (frames1 <= 0)
816                         return frames1;
817                 bytes = frames_to_bytes(runtime, frames1);
818         }
819         return bytes;
820 }
821
822 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
823 {
824         size_t xfer = 0;
825         ssize_t tmp;
826         struct snd_pcm_runtime *runtime = substream->runtime;
827
828         if (atomic_read(&runtime->mmap_count))
829                 return -ENXIO;
830
831         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
832                 return tmp;
833         while (bytes > 0) {
834                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
835                         tmp = bytes;
836                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
837                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
838                         if (tmp > 0) {
839                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
840                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
841                         }
842                         runtime->oss.buffer_used += tmp;
843                         buf += tmp;
844                         bytes -= tmp;
845                         xfer += tmp;
846                         if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
847                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
848                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 
849                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
850                                 if (tmp <= 0)
851                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
852                                 runtime->oss.bytes += tmp;
853                                 runtime->oss.period_ptr += tmp;
854                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
855                                 if (runtime->oss.period_ptr == 0 ||
856                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
857                                         runtime->oss.buffer_used = 0;
858                                 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
859                                         return xfer > 0 ? xfer : -EAGAIN;
860                         }
861                 } else {
862                         tmp = snd_pcm_oss_write2(substream,
863                                                  (const char __force *)buf,
864                                                  runtime->oss.period_bytes, 0);
865                         if (tmp <= 0)
866                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
867                         runtime->oss.bytes += tmp;
868                         buf += tmp;
869                         bytes -= tmp;
870                         xfer += tmp;
871                         if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
872                             tmp != runtime->oss.period_bytes)
873                                 break;
874                 }
875         }
876         return xfer;
877 }
878
879 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
880 {
881         struct snd_pcm_runtime *runtime = substream->runtime;
882         snd_pcm_sframes_t frames, frames1;
883 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
884         char __user *final_dst = (char __user *)buf;
885         if (runtime->oss.plugin_first) {
886                 struct snd_pcm_plugin_channel *channels;
887                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
888                 if (!in_kernel)
889                         buf = runtime->oss.buffer;
890                 frames = bytes / oss_frame_bytes;
891                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
892                 if (frames1 < 0)
893                         return frames1;
894                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
895                 if (frames1 <= 0)
896                         return frames1;
897                 bytes = frames1 * oss_frame_bytes;
898                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
899                         return -EFAULT;
900         } else
901 #endif
902         {
903                 frames = bytes_to_frames(runtime, bytes);
904                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
905                 if (frames1 <= 0)
906                         return frames1;
907                 bytes = frames_to_bytes(runtime, frames1);
908         }
909         return bytes;
910 }
911
912 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
913 {
914         size_t xfer = 0;
915         ssize_t tmp;
916         struct snd_pcm_runtime *runtime = substream->runtime;
917
918         if (atomic_read(&runtime->mmap_count))
919                 return -ENXIO;
920
921         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
922                 return tmp;
923         while (bytes > 0) {
924                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
925                         if (runtime->oss.buffer_used == 0) {
926                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
927                                 if (tmp <= 0)
928                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
929                                 runtime->oss.bytes += tmp;
930                                 runtime->oss.period_ptr = tmp;
931                                 runtime->oss.buffer_used = tmp;
932                         }
933                         tmp = bytes;
934                         if ((size_t) tmp > runtime->oss.buffer_used)
935                                 tmp = runtime->oss.buffer_used;
936                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
937                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
938                         buf += tmp;
939                         bytes -= tmp;
940                         xfer += tmp;
941                         runtime->oss.buffer_used -= tmp;
942                 } else {
943                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
944                                                 runtime->oss.period_bytes, 0);
945                         if (tmp <= 0)
946                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
947                         runtime->oss.bytes += tmp;
948                         buf += tmp;
949                         bytes -= tmp;
950                         xfer += tmp;
951                 }
952         }
953         return xfer;
954 }
955
956 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
957 {
958         struct snd_pcm_substream *substream;
959
960         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
961         if (substream != NULL) {
962                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
963                 substream->runtime->oss.prepare = 1;
964         }
965         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
966         if (substream != NULL) {
967                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
968                 substream->runtime->oss.prepare = 1;
969         }
970         return 0;
971 }
972
973 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
974 {
975         struct snd_pcm_substream *substream;
976         int err;
977
978         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
979         if (substream != NULL) {
980                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
981                         return err;
982                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
983         }
984         /* note: all errors from the start action are ignored */
985         /* OSS apps do not know, how to handle them */
986         return 0;
987 }
988
989 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
990 {
991         struct snd_pcm_runtime *runtime;
992         ssize_t result = 0;
993         long res;
994         wait_queue_t wait;
995
996         runtime = substream->runtime;
997         init_waitqueue_entry(&wait, current);
998         add_wait_queue(&runtime->sleep, &wait);
999 #ifdef OSS_DEBUG
1000         printk("sync1: size = %li\n", size);
1001 #endif
1002         while (1) {
1003                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1004                 if (result > 0) {
1005                         runtime->oss.buffer_used = 0;
1006                         result = 0;
1007                         break;
1008                 }
1009                 if (result != 0 && result != -EAGAIN)
1010                         break;
1011                 result = 0;
1012                 set_current_state(TASK_INTERRUPTIBLE);
1013                 snd_pcm_stream_lock_irq(substream);
1014                 res = runtime->status->state;
1015                 snd_pcm_stream_unlock_irq(substream);
1016                 if (res != SNDRV_PCM_STATE_RUNNING) {
1017                         set_current_state(TASK_RUNNING);
1018                         break;
1019                 }
1020                 res = schedule_timeout(10 * HZ);
1021                 if (signal_pending(current)) {
1022                         result = -ERESTARTSYS;
1023                         break;
1024                 }
1025                 if (res == 0) {
1026                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1027                         result = -EIO;
1028                         break;
1029                 }
1030         }
1031         remove_wait_queue(&runtime->sleep, &wait);
1032         return result;
1033 }
1034
1035 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1036 {
1037         int err = 0;
1038         unsigned int saved_f_flags;
1039         struct snd_pcm_substream *substream;
1040         struct snd_pcm_runtime *runtime;
1041         snd_pcm_format_t format;
1042         unsigned long width;
1043         size_t size;
1044
1045         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1046         if (substream != NULL) {
1047                 runtime = substream->runtime;
1048                 if (atomic_read(&runtime->mmap_count))
1049                         goto __direct;
1050                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1051                         return err;
1052                 format = snd_pcm_oss_format_from(runtime->oss.format);
1053                 width = snd_pcm_format_physical_width(format);
1054                 if (runtime->oss.buffer_used > 0) {
1055 #ifdef OSS_DEBUG
1056                         printk("sync: buffer_used\n");
1057 #endif
1058                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1059                         snd_pcm_format_set_silence(format,
1060                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1061                                                    size);
1062                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1063                         if (err < 0)
1064                                 return err;
1065                 } else if (runtime->oss.period_ptr > 0) {
1066 #ifdef OSS_DEBUG
1067                         printk("sync: period_ptr\n");
1068 #endif
1069                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1070                         snd_pcm_format_set_silence(format,
1071                                                    runtime->oss.buffer,
1072                                                    size * 8 / width);
1073                         err = snd_pcm_oss_sync1(substream, size);
1074                         if (err < 0)
1075                                 return err;
1076                 }
1077                 /*
1078                  * The ALSA's period might be a bit large than OSS one.
1079                  * Fill the remain portion of ALSA period with zeros.
1080                  */
1081                 size = runtime->control->appl_ptr % runtime->period_size;
1082                 if (size > 0) {
1083                         size = runtime->period_size - size;
1084                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1085                                 size = (runtime->frame_bits * size) / 8;
1086                                 while (size > 0) {
1087                                         mm_segment_t fs;
1088                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1089                                         size -= size1;
1090                                         size1 *= 8;
1091                                         size1 /= runtime->sample_bits;
1092                                         snd_pcm_format_set_silence(runtime->format,
1093                                                                    runtime->oss.buffer,
1094                                                                    size1);
1095                                         fs = snd_enter_user();
1096                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1097                                         snd_leave_user(fs);
1098                                 }
1099                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1100                                 void __user *buffers[runtime->channels];
1101                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1102                                 snd_pcm_lib_writev(substream, buffers, size);
1103                         }
1104                 }
1105                 /*
1106                  * finish sync: drain the buffer
1107                  */
1108               __direct:
1109                 saved_f_flags = substream->ffile->f_flags;
1110                 substream->ffile->f_flags &= ~O_NONBLOCK;
1111                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1112                 substream->ffile->f_flags = saved_f_flags;
1113                 if (err < 0)
1114                         return err;
1115                 runtime->oss.prepare = 1;
1116         }
1117
1118         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1119         if (substream != NULL) {
1120                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1121                         return err;
1122                 runtime = substream->runtime;
1123                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1124                 if (err < 0)
1125                         return err;
1126                 runtime->oss.buffer_used = 0;
1127                 runtime->oss.prepare = 1;
1128         }
1129         return 0;
1130 }
1131
1132 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1133 {
1134         int idx;
1135
1136         for (idx = 1; idx >= 0; --idx) {
1137                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1138                 struct snd_pcm_runtime *runtime;
1139                 if (substream == NULL)
1140                         continue;
1141                 runtime = substream->runtime;
1142                 if (rate < 1000)
1143                         rate = 1000;
1144                 else if (rate > 192000)
1145                         rate = 192000;
1146                 if (runtime->oss.rate != rate) {
1147                         runtime->oss.params = 1;
1148                         runtime->oss.rate = rate;
1149                 }
1150         }
1151         return snd_pcm_oss_get_rate(pcm_oss_file);
1152 }
1153
1154 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1155 {
1156         struct snd_pcm_substream *substream;
1157         int err;
1158         
1159         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1160                 return err;
1161         return substream->runtime->oss.rate;
1162 }
1163
1164 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1165 {
1166         int idx;
1167         if (channels < 1)
1168                 channels = 1;
1169         if (channels > 128)
1170                 return -EINVAL;
1171         for (idx = 1; idx >= 0; --idx) {
1172                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1173                 struct snd_pcm_runtime *runtime;
1174                 if (substream == NULL)
1175                         continue;
1176                 runtime = substream->runtime;
1177                 if (runtime->oss.channels != channels) {
1178                         runtime->oss.params = 1;
1179                         runtime->oss.channels = channels;
1180                 }
1181         }
1182         return snd_pcm_oss_get_channels(pcm_oss_file);
1183 }
1184
1185 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1186 {
1187         struct snd_pcm_substream *substream;
1188         int err;
1189         
1190         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1191                 return err;
1192         return substream->runtime->oss.channels;
1193 }
1194
1195 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1196 {
1197         struct snd_pcm_substream *substream;
1198         int err;
1199         
1200         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1201                 return err;
1202         return substream->runtime->oss.period_bytes;
1203 }
1204
1205 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1206 {
1207         struct snd_pcm_substream *substream;
1208         int err;
1209         int direct;
1210         struct snd_pcm_hw_params *params;
1211         unsigned int formats = 0;
1212         struct snd_mask format_mask;
1213         int fmt;
1214
1215         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1216                 return err;
1217         if (atomic_read(&substream->runtime->mmap_count)) {
1218                 direct = 1;
1219         } else {
1220                 struct snd_pcm_oss_setup *setup = substream->oss.setup;
1221                 direct = (setup != NULL && setup->direct);
1222         }
1223         if (!direct)
1224                 return AFMT_MU_LAW | AFMT_U8 |
1225                        AFMT_S16_LE | AFMT_S16_BE |
1226                        AFMT_S8 | AFMT_U16_LE |
1227                        AFMT_U16_BE;
1228         params = kmalloc(sizeof(*params), GFP_KERNEL);
1229         if (!params)
1230                 return -ENOMEM;
1231         _snd_pcm_hw_params_any(params);
1232         err = snd_pcm_hw_refine(substream, params);
1233         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 
1234         kfree(params);
1235         snd_assert(err >= 0, return err);
1236         for (fmt = 0; fmt < 32; ++fmt) {
1237                 if (snd_mask_test(&format_mask, fmt)) {
1238                         int f = snd_pcm_oss_format_to(fmt);
1239                         if (f >= 0)
1240                                 formats |= f;
1241                 }
1242         }
1243         return formats;
1244 }
1245
1246 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1247 {
1248         int formats, idx;
1249         
1250         if (format != AFMT_QUERY) {
1251                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1252                 if (!(formats & format))
1253                         format = AFMT_U8;
1254                 for (idx = 1; idx >= 0; --idx) {
1255                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1256                         struct snd_pcm_runtime *runtime;
1257                         if (substream == NULL)
1258                                 continue;
1259                         runtime = substream->runtime;
1260                         if (runtime->oss.format != format) {
1261                                 runtime->oss.params = 1;
1262                                 runtime->oss.format = format;
1263                         }
1264                 }
1265         }
1266         return snd_pcm_oss_get_format(pcm_oss_file);
1267 }
1268
1269 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1270 {
1271         struct snd_pcm_substream *substream;
1272         int err;
1273         
1274         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1275                 return err;
1276         return substream->runtime->oss.format;
1277 }
1278
1279 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1280 {
1281         struct snd_pcm_runtime *runtime;
1282
1283         if (substream == NULL)
1284                 return 0;
1285         runtime = substream->runtime;
1286         if (subdivide == 0) {
1287                 subdivide = runtime->oss.subdivision;
1288                 if (subdivide == 0)
1289                         subdivide = 1;
1290                 return subdivide;
1291         }
1292         if (runtime->oss.subdivision || runtime->oss.fragshift)
1293                 return -EINVAL;
1294         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1295             subdivide != 8 && subdivide != 16)
1296                 return -EINVAL;
1297         runtime->oss.subdivision = subdivide;
1298         runtime->oss.params = 1;
1299         return subdivide;
1300 }
1301
1302 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1303 {
1304         int err = -EINVAL, idx;
1305
1306         for (idx = 1; idx >= 0; --idx) {
1307                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1308                 if (substream == NULL)
1309                         continue;
1310                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1311                         return err;
1312         }
1313         return err;
1314 }
1315
1316 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1317 {
1318         struct snd_pcm_runtime *runtime;
1319
1320         if (substream == NULL)
1321                 return 0;
1322         runtime = substream->runtime;
1323         if (runtime->oss.subdivision || runtime->oss.fragshift)
1324                 return -EINVAL;
1325         runtime->oss.fragshift = val & 0xffff;
1326         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1327         if (runtime->oss.fragshift < 4)         /* < 16 */
1328                 runtime->oss.fragshift = 4;
1329         if (runtime->oss.maxfrags < 2)
1330                 runtime->oss.maxfrags = 2;
1331         runtime->oss.params = 1;
1332         return 0;
1333 }
1334
1335 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1336 {
1337         int err = -EINVAL, idx;
1338
1339         for (idx = 1; idx >= 0; --idx) {
1340                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1341                 if (substream == NULL)
1342                         continue;
1343                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1344                         return err;
1345         }
1346         return err;
1347 }
1348
1349 static int snd_pcm_oss_nonblock(struct file * file)
1350 {
1351         file->f_flags |= O_NONBLOCK;
1352         return 0;
1353 }
1354
1355 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1356 {
1357
1358         if (substream == NULL) {
1359                 res &= ~DSP_CAP_DUPLEX;
1360                 return res;
1361         }
1362 #ifdef DSP_CAP_MULTI
1363         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1364                 if (substream->pstr->substream_count > 1)
1365                         res |= DSP_CAP_MULTI;
1366 #endif
1367         /* DSP_CAP_REALTIME is set all times: */
1368         /* all ALSA drivers can return actual pointer in ring buffer */
1369 #if defined(DSP_CAP_REALTIME) && 0
1370         {
1371                 struct snd_pcm_runtime *runtime = substream->runtime;
1372                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1373                         res &= ~DSP_CAP_REALTIME;
1374         }
1375 #endif
1376         return res;
1377 }
1378
1379 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1380 {
1381         int result, idx;
1382         
1383         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1384         for (idx = 0; idx < 2; idx++) {
1385                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1386                 result = snd_pcm_oss_get_caps1(substream, result);
1387         }
1388         result |= 0x0001;       /* revision - same as SB AWE 64 */
1389         return result;
1390 }
1391
1392 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1393 {
1394         struct snd_pcm_runtime *runtime = substream->runtime;
1395         snd_pcm_uframes_t appl_ptr;
1396         appl_ptr = hw_ptr + runtime->buffer_size;
1397         appl_ptr %= runtime->boundary;
1398         runtime->control->appl_ptr = appl_ptr;
1399 }
1400
1401 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1402 {
1403         struct snd_pcm_runtime *runtime;
1404         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1405         int err, cmd;
1406
1407 #ifdef OSS_DEBUG
1408         printk("pcm_oss: trigger = 0x%x\n", trigger);
1409 #endif
1410         
1411         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1412         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1413
1414         if (psubstream) {
1415                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1416                         return err;
1417         }
1418         if (csubstream) {
1419                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1420                         return err;
1421         }
1422         if (psubstream) {
1423                 runtime = psubstream->runtime;
1424                 if (trigger & PCM_ENABLE_OUTPUT) {
1425                         if (runtime->oss.trigger)
1426                                 goto _skip1;
1427                         if (atomic_read(&psubstream->runtime->mmap_count))
1428                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1429                         runtime->oss.trigger = 1;
1430                         runtime->start_threshold = 1;
1431                         cmd = SNDRV_PCM_IOCTL_START;
1432                 } else {
1433                         if (!runtime->oss.trigger)
1434                                 goto _skip1;
1435                         runtime->oss.trigger = 0;
1436                         runtime->start_threshold = runtime->boundary;
1437                         cmd = SNDRV_PCM_IOCTL_DROP;
1438                         runtime->oss.prepare = 1;
1439                 }
1440                 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
1441                 if (err < 0)
1442                         return err;
1443         }
1444  _skip1:
1445         if (csubstream) {
1446                 runtime = csubstream->runtime;
1447                 if (trigger & PCM_ENABLE_INPUT) {
1448                         if (runtime->oss.trigger)
1449                                 goto _skip2;
1450                         runtime->oss.trigger = 1;
1451                         runtime->start_threshold = 1;
1452                         cmd = SNDRV_PCM_IOCTL_START;
1453                 } else {
1454                         if (!runtime->oss.trigger)
1455                                 goto _skip2;
1456                         runtime->oss.trigger = 0;
1457                         runtime->start_threshold = runtime->boundary;
1458                         cmd = SNDRV_PCM_IOCTL_DROP;
1459                         runtime->oss.prepare = 1;
1460                 }
1461                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1462                 if (err < 0)
1463                         return err;
1464         }
1465  _skip2:
1466         return 0;
1467 }
1468
1469 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1470 {
1471         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1472         int result = 0;
1473
1474         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1475         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1476         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1477                 result |= PCM_ENABLE_OUTPUT;
1478         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1479                 result |= PCM_ENABLE_INPUT;
1480         return result;
1481 }
1482
1483 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1484 {
1485         struct snd_pcm_substream *substream;
1486         struct snd_pcm_runtime *runtime;
1487         snd_pcm_sframes_t delay;
1488         int err;
1489
1490         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1491         if (substream == NULL)
1492                 return -EINVAL;
1493         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1494                 return err;
1495         runtime = substream->runtime;
1496         if (runtime->oss.params || runtime->oss.prepare)
1497                 return 0;
1498         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1499         if (err == -EPIPE)
1500                 delay = 0;      /* hack for broken OSS applications */
1501         else if (err < 0)
1502                 return err;
1503         return snd_pcm_oss_bytes(substream, delay);
1504 }
1505
1506 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1507 {       
1508         struct snd_pcm_substream *substream;
1509         struct snd_pcm_runtime *runtime;
1510         snd_pcm_sframes_t delay;
1511         int fixup;
1512         struct count_info info;
1513         int err;
1514
1515         if (_info == NULL)
1516                 return -EFAULT;
1517         substream = pcm_oss_file->streams[stream];
1518         if (substream == NULL)
1519                 return -EINVAL;
1520         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1521                 return err;
1522         runtime = substream->runtime;
1523         if (runtime->oss.params || runtime->oss.prepare) {
1524                 memset(&info, 0, sizeof(info));
1525                 if (copy_to_user(_info, &info, sizeof(info)))
1526                         return -EFAULT;
1527                 return 0;
1528         }
1529         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1530                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1531                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1532                         err = 0;
1533                         delay = 0;
1534                         fixup = 0;
1535                 } else {
1536                         fixup = runtime->oss.buffer_used;
1537                 }
1538         } else {
1539                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1540                 fixup = -runtime->oss.buffer_used;
1541         }
1542         if (err < 0)
1543                 return err;
1544         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1545         if (atomic_read(&runtime->mmap_count)) {
1546                 snd_pcm_sframes_t n;
1547                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1548                 if (n < 0)
1549                         n += runtime->boundary;
1550                 info.blocks = n / runtime->period_size;
1551                 runtime->oss.prev_hw_ptr_interrupt = delay;
1552                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1553                         snd_pcm_oss_simulate_fill(substream, delay);
1554                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1555         } else {
1556                 delay = snd_pcm_oss_bytes(substream, delay);
1557                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1558                         struct snd_pcm_oss_setup *setup = substream->oss.setup;
1559                         if (setup && setup->buggyptr)
1560                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1561                         else
1562                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1563                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1564                 } else {
1565                         delay += fixup;
1566                         info.blocks = delay / runtime->oss.period_bytes;
1567                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1568                 }
1569         }
1570         if (copy_to_user(_info, &info, sizeof(info)))
1571                 return -EFAULT;
1572         return 0;
1573 }
1574
1575 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1576 {
1577         struct snd_pcm_substream *substream;
1578         struct snd_pcm_runtime *runtime;
1579         snd_pcm_sframes_t avail;
1580         int fixup;
1581         struct audio_buf_info info;
1582         int err;
1583
1584         if (_info == NULL)
1585                 return -EFAULT;
1586         substream = pcm_oss_file->streams[stream];
1587         if (substream == NULL)
1588                 return -EINVAL;
1589         runtime = substream->runtime;
1590
1591         if (runtime->oss.params &&
1592             (err = snd_pcm_oss_change_params(substream)) < 0)
1593                 return err;
1594
1595         info.fragsize = runtime->oss.period_bytes;
1596         info.fragstotal = runtime->periods;
1597         if (runtime->oss.prepare) {
1598                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1599                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1600                         info.fragments = runtime->oss.periods;
1601                 } else {
1602                         info.bytes = 0;
1603                         info.fragments = 0;
1604                 }
1605         } else {
1606                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1607                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1608                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1609                                 avail = runtime->buffer_size;
1610                                 err = 0;
1611                                 fixup = 0;
1612                         } else {
1613                                 avail = runtime->buffer_size - avail;
1614                                 fixup = -runtime->oss.buffer_used;
1615                         }
1616                 } else {
1617                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1618                         fixup = runtime->oss.buffer_used;
1619                 }
1620                 if (err < 0)
1621                         return err;
1622                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1623                 info.fragments = info.bytes / runtime->oss.period_bytes;
1624         }
1625
1626 #ifdef OSS_DEBUG
1627         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1628 #endif
1629         if (copy_to_user(_info, &info, sizeof(info)))
1630                 return -EFAULT;
1631         return 0;
1632 }
1633
1634 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1635 {
1636         // it won't be probably implemented
1637         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1638         return -EINVAL;
1639 }
1640
1641 static struct snd_pcm_oss_setup *snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, const char *task_name)
1642 {
1643         const char *ptr, *ptrl;
1644         struct snd_pcm_oss_setup *setup;
1645
1646         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
1647         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1648                 if (!strcmp(setup->task_name, task_name)) {
1649                         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1650                         return setup;
1651                 }
1652         }
1653         ptr = ptrl = task_name;
1654         while (*ptr) {
1655                 if (*ptr == '/')
1656                         ptrl = ptr + 1;
1657                 ptr++;
1658         }
1659         if (ptrl == task_name) {
1660                 goto __not_found;
1661                 return NULL;
1662         }
1663         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1664                 if (!strcmp(setup->task_name, ptrl)) {
1665                         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1666                         return setup;
1667                 }
1668         }
1669       __not_found:
1670         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1671         return NULL;
1672 }
1673
1674 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
1675 {
1676         struct snd_pcm_runtime *runtime;
1677         runtime = substream->runtime;
1678         vfree(runtime->oss.buffer);
1679         runtime->oss.buffer = NULL;
1680 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1681         snd_pcm_oss_plugin_clear(substream);
1682 #endif
1683         substream->oss.oss = 0;
1684 }
1685
1686 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
1687                                        struct snd_pcm_oss_setup *setup,
1688                                        int minor)
1689 {
1690         struct snd_pcm_runtime *runtime;
1691
1692         substream->oss.oss = 1;
1693         substream->oss.setup = setup;
1694         if (setup->nonblock)
1695                 substream->ffile->f_flags |= O_NONBLOCK;
1696         else
1697                 substream->ffile->f_flags &= ~O_NONBLOCK;
1698         runtime = substream->runtime;
1699         runtime->oss.params = 1;
1700         runtime->oss.trigger = 1;
1701         runtime->oss.rate = 8000;
1702         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1703         case SNDRV_MINOR_OSS_PCM_8:
1704                 runtime->oss.format = AFMT_U8;
1705                 break;
1706         case SNDRV_MINOR_OSS_PCM_16:
1707                 runtime->oss.format = AFMT_S16_LE;
1708                 break;
1709         default:
1710                 runtime->oss.format = AFMT_MU_LAW;
1711         }
1712         runtime->oss.channels = 1;
1713         runtime->oss.fragshift = 0;
1714         runtime->oss.maxfrags = 0;
1715         runtime->oss.subdivision = 0;
1716         substream->pcm_release = snd_pcm_oss_release_substream;
1717 }
1718
1719 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1720 {
1721         int cidx;
1722         snd_assert(pcm_oss_file != NULL, return -ENXIO);
1723         for (cidx = 0; cidx < 2; ++cidx) {
1724                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
1725                 if (substream)
1726                         snd_pcm_release_substream(substream);
1727         }
1728         kfree(pcm_oss_file);
1729         return 0;
1730 }
1731
1732 static int snd_pcm_oss_open_file(struct file *file,
1733                                  struct snd_pcm *pcm,
1734                                  struct snd_pcm_oss_file **rpcm_oss_file,
1735                                  int minor,
1736                                  struct snd_pcm_oss_setup **setup)
1737 {
1738         int idx, err;
1739         struct snd_pcm_oss_file *pcm_oss_file;
1740         struct snd_pcm_substream *substream;
1741         unsigned int f_mode = file->f_mode;
1742
1743         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1744         *rpcm_oss_file = NULL;
1745
1746         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1747         if (pcm_oss_file == NULL)
1748                 return -ENOMEM;
1749
1750         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1751             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1752                 f_mode = FMODE_WRITE;
1753
1754         for (idx = 0; idx < 2; idx++) {
1755                 if (! setup[idx] || setup[idx]->disable)
1756                         continue;
1757                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
1758                         if (! (f_mode & FMODE_WRITE))
1759                                 continue;
1760                 } else {
1761                         if (! (f_mode & FMODE_READ))
1762                                 continue;
1763                 }
1764                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
1765                 if (err < 0) {
1766                         snd_pcm_oss_release_file(pcm_oss_file);
1767                         return err;
1768                 }
1769
1770                 pcm_oss_file->streams[idx] = substream;
1771                 snd_pcm_oss_init_substream(substream, setup[idx], minor);
1772         }
1773         
1774         if (! pcm_oss_file->streams[0] && pcm_oss_file->streams[1]) {
1775                 snd_pcm_oss_release_file(pcm_oss_file);
1776                 return -EINVAL;
1777         }
1778
1779         file->private_data = pcm_oss_file;
1780         *rpcm_oss_file = pcm_oss_file;
1781         return 0;
1782 }
1783
1784
1785 static int snd_task_name(struct task_struct *task, char *name, size_t size)
1786 {
1787         unsigned int idx;
1788
1789         snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
1790         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
1791                 name[idx] = task->comm[idx];
1792         name[idx] = '\0';
1793         return 0;
1794 }
1795
1796 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1797 {
1798         int err;
1799         char task_name[32];
1800         struct snd_pcm *pcm;
1801         struct snd_pcm_oss_file *pcm_oss_file;
1802         struct snd_pcm_oss_setup *setup[2];
1803         int nonblock;
1804         wait_queue_t wait;
1805
1806         pcm = snd_lookup_oss_minor_data(iminor(inode),
1807                                         SNDRV_OSS_DEVICE_TYPE_PCM);
1808         if (pcm == NULL) {
1809                 err = -ENODEV;
1810                 goto __error1;
1811         }
1812         err = snd_card_file_add(pcm->card, file);
1813         if (err < 0)
1814                 goto __error1;
1815         if (!try_module_get(pcm->card->module)) {
1816                 err = -EFAULT;
1817                 goto __error2;
1818         }
1819         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1820                 err = -EFAULT;
1821                 goto __error;
1822         }
1823         memset(setup, 0, sizeof(*setup));
1824         if (file->f_mode & FMODE_WRITE)
1825                 setup[0] = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1826         if (file->f_mode & FMODE_READ)
1827                 setup[1] = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1828
1829         nonblock = !!(file->f_flags & O_NONBLOCK);
1830         if (!nonblock)
1831                 nonblock = nonblock_open;
1832
1833         init_waitqueue_entry(&wait, current);
1834         add_wait_queue(&pcm->open_wait, &wait);
1835         mutex_lock(&pcm->open_mutex);
1836         while (1) {
1837                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1838                                             iminor(inode), setup);
1839                 if (err >= 0)
1840                         break;
1841                 if (err == -EAGAIN) {
1842                         if (nonblock) {
1843                                 err = -EBUSY;
1844                                 break;
1845                         }
1846                 } else
1847                         break;
1848                 set_current_state(TASK_INTERRUPTIBLE);
1849                 mutex_unlock(&pcm->open_mutex);
1850                 schedule();
1851                 mutex_lock(&pcm->open_mutex);
1852                 if (signal_pending(current)) {
1853                         err = -ERESTARTSYS;
1854                         break;
1855                 }
1856         }
1857         remove_wait_queue(&pcm->open_wait, &wait);
1858         mutex_unlock(&pcm->open_mutex);
1859         if (err < 0)
1860                 goto __error;
1861         return err;
1862
1863       __error:
1864         module_put(pcm->card->module);
1865       __error2:
1866         snd_card_file_remove(pcm->card, file);
1867       __error1:
1868         return err;
1869 }
1870
1871 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1872 {
1873         struct snd_pcm *pcm;
1874         struct snd_pcm_substream *substream;
1875         struct snd_pcm_oss_file *pcm_oss_file;
1876
1877         pcm_oss_file = file->private_data;
1878         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1879         if (substream == NULL)
1880                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1881         snd_assert(substream != NULL, return -ENXIO);
1882         pcm = substream->pcm;
1883         snd_pcm_oss_sync(pcm_oss_file);
1884         mutex_lock(&pcm->open_mutex);
1885         snd_pcm_oss_release_file(pcm_oss_file);
1886         mutex_unlock(&pcm->open_mutex);
1887         wake_up(&pcm->open_wait);
1888         module_put(pcm->card->module);
1889         snd_card_file_remove(pcm->card, file);
1890         return 0;
1891 }
1892
1893 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1894 {
1895         struct snd_pcm_oss_file *pcm_oss_file;
1896         int __user *p = (int __user *)arg;
1897         int res;
1898
1899         pcm_oss_file = file->private_data;
1900         if (cmd == OSS_GETVERSION)
1901                 return put_user(SNDRV_OSS_VERSION, p);
1902         if (cmd == OSS_ALSAEMULVER)
1903                 return put_user(1, p);
1904 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1905         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
1906                 struct snd_pcm_substream *substream;
1907                 int idx;
1908                 for (idx = 0; idx < 2; ++idx) {
1909                         substream = pcm_oss_file->streams[idx];
1910                         if (substream != NULL)
1911                                 break;
1912                 }
1913                 snd_assert(substream != NULL, return -ENXIO);
1914                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1915         }
1916 #endif
1917         if (((cmd >> 8) & 0xff) != 'P')
1918                 return -EINVAL;
1919 #ifdef OSS_DEBUG
1920         printk("pcm_oss: ioctl = 0x%x\n", cmd);
1921 #endif
1922         switch (cmd) {
1923         case SNDCTL_DSP_RESET:
1924                 return snd_pcm_oss_reset(pcm_oss_file);
1925         case SNDCTL_DSP_SYNC:
1926                 return snd_pcm_oss_sync(pcm_oss_file);
1927         case SNDCTL_DSP_SPEED:
1928                 if (get_user(res, p))
1929                         return -EFAULT;
1930                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1931                         return res;
1932                 return put_user(res, p);
1933         case SOUND_PCM_READ_RATE:
1934                 res = snd_pcm_oss_get_rate(pcm_oss_file);
1935                 if (res < 0)
1936                         return res;
1937                 return put_user(res, p);
1938         case SNDCTL_DSP_STEREO:
1939                 if (get_user(res, p))
1940                         return -EFAULT;
1941                 res = res > 0 ? 2 : 1;
1942                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1943                         return res;
1944                 return put_user(--res, p);
1945         case SNDCTL_DSP_GETBLKSIZE:
1946                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1947                 if (res < 0)
1948                         return res;
1949                 return put_user(res, p);
1950         case SNDCTL_DSP_SETFMT:
1951                 if (get_user(res, p))
1952                         return -EFAULT;
1953                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1954                 if (res < 0)
1955                         return res;
1956                 return put_user(res, p);
1957         case SOUND_PCM_READ_BITS:
1958                 res = snd_pcm_oss_get_format(pcm_oss_file);
1959                 if (res < 0)
1960                         return res;
1961                 return put_user(res, p);
1962         case SNDCTL_DSP_CHANNELS:
1963                 if (get_user(res, p))
1964                         return -EFAULT;
1965                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
1966                 if (res < 0)
1967                         return res;
1968                 return put_user(res, p);
1969         case SOUND_PCM_READ_CHANNELS:
1970                 res = snd_pcm_oss_get_channels(pcm_oss_file);
1971                 if (res < 0)
1972                         return res;
1973                 return put_user(res, p);
1974         case SOUND_PCM_WRITE_FILTER:
1975         case SOUND_PCM_READ_FILTER:
1976                 return -EIO;
1977         case SNDCTL_DSP_POST:
1978                 return snd_pcm_oss_post(pcm_oss_file);
1979         case SNDCTL_DSP_SUBDIVIDE:
1980                 if (get_user(res, p))
1981                         return -EFAULT;
1982                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
1983                 if (res < 0)
1984                         return res;
1985                 return put_user(res, p);
1986         case SNDCTL_DSP_SETFRAGMENT:
1987                 if (get_user(res, p))
1988                         return -EFAULT;
1989                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
1990         case SNDCTL_DSP_GETFMTS:
1991                 res = snd_pcm_oss_get_formats(pcm_oss_file);
1992                 if (res < 0)
1993                         return res;
1994                 return put_user(res, p);
1995         case SNDCTL_DSP_GETOSPACE:
1996         case SNDCTL_DSP_GETISPACE:
1997                 return snd_pcm_oss_get_space(pcm_oss_file,
1998                         cmd == SNDCTL_DSP_GETISPACE ?
1999                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2000                         (struct audio_buf_info __user *) arg);
2001         case SNDCTL_DSP_NONBLOCK:
2002                 return snd_pcm_oss_nonblock(file);
2003         case SNDCTL_DSP_GETCAPS:
2004                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2005                 if (res < 0)
2006                         return res;
2007                 return put_user(res, p);
2008         case SNDCTL_DSP_GETTRIGGER:
2009                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2010                 if (res < 0)
2011                         return res;
2012                 return put_user(res, p);
2013         case SNDCTL_DSP_SETTRIGGER:
2014                 if (get_user(res, p))
2015                         return -EFAULT;
2016                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2017         case SNDCTL_DSP_GETIPTR:
2018         case SNDCTL_DSP_GETOPTR:
2019                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2020                         cmd == SNDCTL_DSP_GETIPTR ?
2021                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2022                         (struct count_info __user *) arg);
2023         case SNDCTL_DSP_MAPINBUF:
2024         case SNDCTL_DSP_MAPOUTBUF:
2025                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2026                         cmd == SNDCTL_DSP_MAPINBUF ?
2027                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2028                         (struct buffmem_desc __user *) arg);
2029         case SNDCTL_DSP_SETSYNCRO:
2030                 /* stop DMA now.. */
2031                 return 0;
2032         case SNDCTL_DSP_SETDUPLEX:
2033                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2034                         return 0;
2035                 return -EIO;
2036         case SNDCTL_DSP_GETODELAY:
2037                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2038                 if (res < 0) {
2039                         /* it's for sure, some broken apps don't check for error codes */
2040                         put_user(0, p);
2041                         return res;
2042                 }
2043                 return put_user(res, p);
2044         case SNDCTL_DSP_PROFILE:
2045                 return 0;       /* silently ignore */
2046         default:
2047                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2048         }
2049         return -EINVAL;
2050 }
2051
2052 #ifdef CONFIG_COMPAT
2053 /* all compatible */
2054 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2055 #else
2056 #define snd_pcm_oss_ioctl_compat        NULL
2057 #endif
2058
2059 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2060 {
2061         struct snd_pcm_oss_file *pcm_oss_file;
2062         struct snd_pcm_substream *substream;
2063
2064         pcm_oss_file = file->private_data;
2065         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2066         if (substream == NULL)
2067                 return -ENXIO;
2068 #ifndef OSS_DEBUG
2069         return snd_pcm_oss_read1(substream, buf, count);
2070 #else
2071         {
2072                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2073                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2074                 return res;
2075         }
2076 #endif
2077 }
2078
2079 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2080 {
2081         struct snd_pcm_oss_file *pcm_oss_file;
2082         struct snd_pcm_substream *substream;
2083         long result;
2084
2085         pcm_oss_file = file->private_data;
2086         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2087         if (substream == NULL)
2088                 return -ENXIO;
2089         result = snd_pcm_oss_write1(substream, buf, count);
2090 #ifdef OSS_DEBUG
2091         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2092 #endif
2093         return result;
2094 }
2095
2096 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2097 {
2098         struct snd_pcm_runtime *runtime = substream->runtime;
2099         if (atomic_read(&runtime->mmap_count))
2100                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2101         else
2102                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2103 }
2104
2105 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2106 {
2107         struct snd_pcm_runtime *runtime = substream->runtime;
2108         if (atomic_read(&runtime->mmap_count))
2109                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2110         else
2111                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2112 }
2113
2114 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2115 {
2116         struct snd_pcm_oss_file *pcm_oss_file;
2117         unsigned int mask;
2118         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2119         
2120         pcm_oss_file = file->private_data;
2121
2122         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2123         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2124
2125         mask = 0;
2126         if (psubstream != NULL) {
2127                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2128                 poll_wait(file, &runtime->sleep, wait);
2129                 snd_pcm_stream_lock_irq(psubstream);
2130                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2131                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2132                      snd_pcm_oss_playback_ready(psubstream)))
2133                         mask |= POLLOUT | POLLWRNORM;
2134                 snd_pcm_stream_unlock_irq(psubstream);
2135         }
2136         if (csubstream != NULL) {
2137                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2138                 snd_pcm_state_t ostate;
2139                 poll_wait(file, &runtime->sleep, wait);
2140                 snd_pcm_stream_lock_irq(csubstream);
2141                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2142                     snd_pcm_oss_capture_ready(csubstream))
2143                         mask |= POLLIN | POLLRDNORM;
2144                 snd_pcm_stream_unlock_irq(csubstream);
2145                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2146                         struct snd_pcm_oss_file ofile;
2147                         memset(&ofile, 0, sizeof(ofile));
2148                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2149                         runtime->oss.trigger = 0;
2150                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2151                 }
2152         }
2153
2154         return mask;
2155 }
2156
2157 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2158 {
2159         struct snd_pcm_oss_file *pcm_oss_file;
2160         struct snd_pcm_substream *substream = NULL;
2161         struct snd_pcm_runtime *runtime;
2162         int err;
2163
2164 #ifdef OSS_DEBUG
2165         printk("pcm_oss: mmap begin\n");
2166 #endif
2167         pcm_oss_file = file->private_data;
2168         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2169         case VM_READ | VM_WRITE:
2170                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2171                 if (substream)
2172                         break;
2173                 /* Fall through */
2174         case VM_READ:
2175                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2176                 break;
2177         case VM_WRITE:
2178                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2179                 break;
2180         default:
2181                 return -EINVAL;
2182         }
2183         /* set VM_READ access as well to fix memset() routines that do
2184            reads before writes (to improve performance) */
2185         area->vm_flags |= VM_READ;
2186         if (substream == NULL)
2187                 return -ENXIO;
2188         runtime = substream->runtime;
2189         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2190                 return -EIO;
2191         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2192                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2193         else
2194                 return -EIO;
2195         
2196         if (runtime->oss.params) {
2197                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2198                         return err;
2199         }
2200 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2201         if (runtime->oss.plugin_first != NULL)
2202                 return -EIO;
2203 #endif
2204
2205         if (area->vm_pgoff != 0)
2206                 return -EINVAL;
2207
2208         err = snd_pcm_mmap_data(substream, file, area);
2209         if (err < 0)
2210                 return err;
2211         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2212         runtime->silence_threshold = 0;
2213         runtime->silence_size = 0;
2214 #ifdef OSS_DEBUG
2215         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2216 #endif
2217         /* In mmap mode we never stop */
2218         runtime->stop_threshold = runtime->boundary;
2219
2220         return 0;
2221 }
2222
2223 #ifdef CONFIG_PROC_FS
2224 /*
2225  *  /proc interface
2226  */
2227
2228 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2229                                   struct snd_info_buffer *buffer)
2230 {
2231         struct snd_pcm_str *pstr = entry->private_data;
2232         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2233         mutex_lock(&pstr->oss.setup_mutex);
2234         while (setup) {
2235                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2236                             setup->task_name,
2237                             setup->periods,
2238                             setup->period_size,
2239                             setup->disable ? " disable" : "",
2240                             setup->direct ? " direct" : "",
2241                             setup->block ? " block" : "",
2242                             setup->nonblock ? " non-block" : "",
2243                             setup->partialfrag ? " partial-frag" : "",
2244                             setup->nosilence ? " no-silence" : "");
2245                 setup = setup->next;
2246         }
2247         mutex_unlock(&pstr->oss.setup_mutex);
2248 }
2249
2250 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2251 {
2252         unsigned int idx;
2253         struct snd_pcm_substream *substream;
2254         struct snd_pcm_oss_setup *setup, *setupn;
2255
2256         for (idx = 0, substream = pstr->substream;
2257              idx < pstr->substream_count; idx++, substream = substream->next)
2258                 substream->oss.setup = NULL;
2259         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2260              setup; setup = setupn) {
2261                 setupn = setup->next;
2262                 kfree(setup->task_name);
2263                 kfree(setup);
2264         }
2265         pstr->oss.setup_list = NULL;
2266 }
2267
2268 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2269                                    struct snd_info_buffer *buffer)
2270 {
2271         struct snd_pcm_str *pstr = entry->private_data;
2272         char line[128], str[32], task_name[32], *ptr;
2273         int idx1;
2274         struct snd_pcm_oss_setup *setup, *setup1, template;
2275
2276         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2277                 mutex_lock(&pstr->oss.setup_mutex);
2278                 memset(&template, 0, sizeof(template));
2279                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2280                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2281                         snd_pcm_oss_proc_free_setup_list(pstr);
2282                         mutex_unlock(&pstr->oss.setup_mutex);
2283                         continue;
2284                 }
2285                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2286                         if (!strcmp(setup->task_name, task_name)) {
2287                                 template = *setup;
2288                                 break;
2289                         }
2290                 }
2291                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2292                 template.periods = simple_strtoul(str, NULL, 10);
2293                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2294                 template.period_size = simple_strtoul(str, NULL, 10);
2295                 for (idx1 = 31; idx1 >= 0; idx1--)
2296                         if (template.period_size & (1 << idx1))
2297                                 break;
2298                 for (idx1--; idx1 >= 0; idx1--)
2299                         template.period_size &= ~(1 << idx1);
2300                 do {
2301                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2302                         if (!strcmp(str, "disable")) {
2303                                 template.disable = 1;
2304                         } else if (!strcmp(str, "direct")) {
2305                                 template.direct = 1;
2306                         } else if (!strcmp(str, "block")) {
2307                                 template.block = 1;
2308                         } else if (!strcmp(str, "non-block")) {
2309                                 template.nonblock = 1;
2310                         } else if (!strcmp(str, "partial-frag")) {
2311                                 template.partialfrag = 1;
2312                         } else if (!strcmp(str, "no-silence")) {
2313                                 template.nosilence = 1;
2314                         } else if (!strcmp(str, "buggy-ptr")) {
2315                                 template.buggyptr = 1;
2316                         }
2317                 } while (*str);
2318                 if (setup == NULL) {
2319                         setup = kmalloc(sizeof(struct snd_pcm_oss_setup), GFP_KERNEL);
2320                         if (setup) {
2321                                 if (pstr->oss.setup_list == NULL) {
2322                                         pstr->oss.setup_list = setup;
2323                                 } else {
2324                                         for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2325                                         setup1->next = setup;
2326                                 }
2327                                 template.task_name = kstrdup(task_name, GFP_KERNEL);
2328                         } else {
2329                                 buffer->error = -ENOMEM;
2330                         }
2331                 }
2332                 if (setup)
2333                         *setup = template;
2334                 mutex_unlock(&pstr->oss.setup_mutex);
2335         }
2336 }
2337
2338 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2339 {
2340         int stream;
2341         for (stream = 0; stream < 2; ++stream) {
2342                 struct snd_info_entry *entry;
2343                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2344                 if (pstr->substream_count == 0)
2345                         continue;
2346                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2347                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2348                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2349                         entry->c.text.read_size = 8192;
2350                         entry->c.text.read = snd_pcm_oss_proc_read;
2351                         entry->c.text.write_size = 8192;
2352                         entry->c.text.write = snd_pcm_oss_proc_write;
2353                         entry->private_data = pstr;
2354                         if (snd_info_register(entry) < 0) {
2355                                 snd_info_free_entry(entry);
2356                                 entry = NULL;
2357                         }
2358                 }
2359                 pstr->oss.proc_entry = entry;
2360         }
2361 }
2362
2363 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2364 {
2365         int stream;
2366         for (stream = 0; stream < 2; ++stream) {
2367                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2368                 if (pstr->oss.proc_entry) {
2369                         snd_info_unregister(pstr->oss.proc_entry);
2370                         pstr->oss.proc_entry = NULL;
2371                         snd_pcm_oss_proc_free_setup_list(pstr);
2372                 }
2373         }
2374 }
2375 #else /* !CONFIG_PROC_FS */
2376 #define snd_pcm_oss_proc_init(pcm)
2377 #define snd_pcm_oss_proc_done(pcm)
2378 #endif /* CONFIG_PROC_FS */
2379
2380 /*
2381  *  ENTRY functions
2382  */
2383
2384 static struct file_operations snd_pcm_oss_f_reg =
2385 {
2386         .owner =        THIS_MODULE,
2387         .read =         snd_pcm_oss_read,
2388         .write =        snd_pcm_oss_write,
2389         .open =         snd_pcm_oss_open,
2390         .release =      snd_pcm_oss_release,
2391         .poll =         snd_pcm_oss_poll,
2392         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2393         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2394         .mmap =         snd_pcm_oss_mmap,
2395 };
2396
2397 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2398 {
2399         char name[128];
2400         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2401         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2402                                     pcm->card, index, &snd_pcm_oss_f_reg,
2403                                     pcm, name) < 0) {
2404                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2405                            pcm->card->number, pcm->device);
2406         }
2407 }
2408
2409 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2410 {
2411         pcm->oss.reg = 0;
2412         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2413                 char name[128];
2414                 int duplex;
2415                 register_oss_dsp(pcm, 0);
2416                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 
2417                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 
2418                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2419                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2420 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2421                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2422                                       pcm->card->number,
2423                                       name);
2424 #endif
2425                 pcm->oss.reg++;
2426                 pcm->oss.reg_mask |= 1;
2427         }
2428         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2429                 register_oss_dsp(pcm, 1);
2430                 pcm->oss.reg++;
2431                 pcm->oss.reg_mask |= 2;
2432         }
2433
2434         if (pcm->oss.reg)
2435                 snd_pcm_oss_proc_init(pcm);
2436
2437         return 0;
2438 }
2439
2440 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2441 {
2442         if (pcm->oss.reg) {
2443                 if (pcm->oss.reg_mask & 1) {
2444                         pcm->oss.reg_mask &= ~1;
2445                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2446                                                   pcm->card, 0);
2447                 }
2448                 if (pcm->oss.reg_mask & 2) {
2449                         pcm->oss.reg_mask &= ~2;
2450                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2451                                                   pcm->card, 1);
2452                 }
2453         }
2454         return 0;
2455 }
2456
2457 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
2458 {
2459         snd_pcm_oss_disconnect_minor(pcm);
2460         if (pcm->oss.reg) {
2461                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2462 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2463                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2464 #endif
2465                 }
2466                 pcm->oss.reg = 0;
2467                 snd_pcm_oss_proc_done(pcm);
2468         }
2469         return 0;
2470 }
2471
2472 static struct snd_pcm_notify snd_pcm_oss_notify =
2473 {
2474         .n_register =   snd_pcm_oss_register_minor,
2475         .n_disconnect = snd_pcm_oss_disconnect_minor,
2476         .n_unregister = snd_pcm_oss_unregister_minor,
2477 };
2478
2479 static int __init alsa_pcm_oss_init(void)
2480 {
2481         int i;
2482         int err;
2483
2484         /* check device map table */
2485         for (i = 0; i < SNDRV_CARDS; i++) {
2486                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2487                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
2488                                    i, dsp_map[i]);
2489                         dsp_map[i] = 0;
2490                 }
2491                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2492                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
2493                                    i, adsp_map[i]);
2494                         adsp_map[i] = 1;
2495                 }
2496         }
2497         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2498                 return err;
2499         return 0;
2500 }
2501
2502 static void __exit alsa_pcm_oss_exit(void)
2503 {
2504         snd_pcm_notify(&snd_pcm_oss_notify, 1);
2505 }
2506
2507 module_init(alsa_pcm_oss_init)
2508 module_exit(alsa_pcm_oss_exit)