[ALSA] Make snd_task_name() module local
[linux-2.6.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(snd_card_t *card, unsigned int cmd, unsigned long arg);
65 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file);
66 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file);
67 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *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 static int snd_pcm_oss_plugin_clear(snd_pcm_substream_t *substream)
82 {
83         snd_pcm_runtime_t *runtime = substream->runtime;
84         snd_pcm_plugin_t *plugin, *next;
85         
86         plugin = runtime->oss.plugin_first;
87         while (plugin) {
88                 next = plugin->next;
89                 snd_pcm_plugin_free(plugin);
90                 plugin = next;
91         }
92         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
93         return 0;
94 }
95
96 static int snd_pcm_plugin_insert(snd_pcm_plugin_t *plugin)
97 {
98         snd_pcm_runtime_t *runtime = plugin->plug->runtime;
99         plugin->next = runtime->oss.plugin_first;
100         plugin->prev = NULL;
101         if (runtime->oss.plugin_first) {
102                 runtime->oss.plugin_first->prev = plugin;
103                 runtime->oss.plugin_first = plugin;
104         } else {
105                 runtime->oss.plugin_last =
106                 runtime->oss.plugin_first = plugin;
107         }
108         return 0;
109 }
110
111 int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin)
112 {
113         snd_pcm_runtime_t *runtime = plugin->plug->runtime;
114         plugin->next = NULL;
115         plugin->prev = runtime->oss.plugin_last;
116         if (runtime->oss.plugin_last) {
117                 runtime->oss.plugin_last->next = plugin;
118                 runtime->oss.plugin_last = plugin;
119         } else {
120                 runtime->oss.plugin_last =
121                 runtime->oss.plugin_first = plugin;
122         }
123         return 0;
124 }
125
126 static long snd_pcm_oss_bytes(snd_pcm_substream_t *substream, long frames)
127 {
128         snd_pcm_runtime_t *runtime = substream->runtime;
129         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
130         long bytes = frames_to_bytes(runtime, frames);
131         if (buffer_size == runtime->oss.buffer_bytes)
132                 return bytes;
133 #if BITS_PER_LONG >= 64
134         return runtime->oss.buffer_bytes * bytes / buffer_size;
135 #else
136         {
137                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
138                 u32 rem;
139                 div64_32(&bsize, buffer_size, &rem);
140                 return (long)bsize;
141         }
142 #endif
143 }
144
145 static long snd_pcm_alsa_frames(snd_pcm_substream_t *substream, long bytes)
146 {
147         snd_pcm_runtime_t *runtime = substream->runtime;
148         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
149         if (buffer_size == runtime->oss.buffer_bytes)
150                 return bytes_to_frames(runtime, bytes);
151         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
152 }
153
154 static int snd_pcm_oss_format_from(int format)
155 {
156         switch (format) {
157         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
158         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
159         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
160         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
161         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
162         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
163         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
164         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
165         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
166         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
167         default:                return SNDRV_PCM_FORMAT_U8;
168         }
169 }
170
171 static int snd_pcm_oss_format_to(int format)
172 {
173         switch (format) {
174         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
175         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
176         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
177         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
178         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
179         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
180         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
181         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
182         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
183         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
184         default:                        return -EINVAL;
185         }
186 }
187
188 static int snd_pcm_oss_period_size(snd_pcm_substream_t *substream, 
189                                    snd_pcm_hw_params_t *oss_params,
190                                    snd_pcm_hw_params_t *slave_params)
191 {
192         size_t s;
193         size_t oss_buffer_size, oss_period_size, oss_periods;
194         size_t min_period_size, max_period_size;
195         snd_pcm_runtime_t *runtime = substream->runtime;
196         size_t oss_frame_size;
197
198         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
199                          params_channels(oss_params) / 8;
200
201         oss_buffer_size = snd_pcm_plug_client_size(substream,
202                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
203         oss_buffer_size = 1 << ld2(oss_buffer_size);
204         if (atomic_read(&runtime->mmap_count)) {
205                 if (oss_buffer_size > runtime->oss.mmap_bytes)
206                         oss_buffer_size = runtime->oss.mmap_bytes;
207         }
208
209         if (substream->oss.setup &&
210             substream->oss.setup->period_size > 16)
211                 oss_period_size = substream->oss.setup->period_size;
212         else if (runtime->oss.fragshift) {
213                 oss_period_size = 1 << runtime->oss.fragshift;
214                 if (oss_period_size > oss_buffer_size / 2)
215                         oss_period_size = oss_buffer_size / 2;
216         } else {
217                 int sd;
218                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
219
220                 oss_period_size = oss_buffer_size;
221                 do {
222                         oss_period_size /= 2;
223                 } while (oss_period_size > bytes_per_sec);
224                 if (runtime->oss.subdivision == 0) {
225                         sd = 4;
226                         if (oss_period_size / sd > 4096)
227                                 sd *= 2;
228                         if (oss_period_size / sd < 4096)
229                                 sd = 1;
230                 } else
231                         sd = runtime->oss.subdivision;
232                 oss_period_size /= sd;
233                 if (oss_period_size < 16)
234                         oss_period_size = 16;
235         }
236
237         min_period_size = snd_pcm_plug_client_size(substream,
238                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
239         min_period_size *= oss_frame_size;
240         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
241         if (oss_period_size < min_period_size)
242                 oss_period_size = min_period_size;
243
244         max_period_size = snd_pcm_plug_client_size(substream,
245                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
246         max_period_size *= oss_frame_size;
247         max_period_size = 1 << ld2(max_period_size);
248         if (oss_period_size > max_period_size)
249                 oss_period_size = max_period_size;
250
251         oss_periods = oss_buffer_size / oss_period_size;
252
253         if (substream->oss.setup) {
254                 if (substream->oss.setup->periods > 1)
255                         oss_periods = substream->oss.setup->periods;
256         }
257
258         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
259         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
260                 s = runtime->oss.maxfrags;
261         if (oss_periods > s)
262                 oss_periods = s;
263
264         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
265         if (s < 2)
266                 s = 2;
267         if (oss_periods < s)
268                 oss_periods = s;
269
270         while (oss_period_size * oss_periods > oss_buffer_size)
271                 oss_period_size /= 2;
272
273         snd_assert(oss_period_size >= 16, return -EINVAL);
274         runtime->oss.period_bytes = oss_period_size;
275         runtime->oss.period_frames = 1;
276         runtime->oss.periods = oss_periods;
277         return 0;
278 }
279
280 static int choose_rate(snd_pcm_substream_t *substream,
281                        snd_pcm_hw_params_t *params, unsigned int best_rate)
282 {
283         snd_interval_t *it;
284         snd_pcm_hw_params_t *save;
285         unsigned int rate, prev;
286
287         save = kmalloc(sizeof(*save), GFP_KERNEL);
288         if (save == NULL)
289                 return -ENOMEM;
290         *save = *params;
291         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
292
293         /* try multiples of the best rate */
294         rate = best_rate;
295         for (;;) {
296                 if (it->max < rate || (it->max == rate && it->openmax))
297                         break;
298                 if (it->min < rate || (it->min == rate && !it->openmin)) {
299                         int ret;
300                         ret = snd_pcm_hw_param_set(substream, params,
301                                                    SNDRV_PCM_HW_PARAM_RATE,
302                                                    rate, 0);
303                         if (ret == (int)rate) {
304                                 kfree(save);
305                                 return rate;
306                         }
307                         *params = *save;
308                 }
309                 prev = rate;
310                 rate += best_rate;
311                 if (rate <= prev)
312                         break;
313         }
314
315         /* not found, use the nearest rate */
316         kfree(save);
317         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
318 }
319
320 static int snd_pcm_oss_change_params(snd_pcm_substream_t *substream)
321 {
322         snd_pcm_runtime_t *runtime = substream->runtime;
323         snd_pcm_hw_params_t *params, *sparams;
324         snd_pcm_sw_params_t *sw_params;
325         ssize_t oss_buffer_size, oss_period_size;
326         size_t oss_frame_size;
327         int err;
328         int direct;
329         int format, sformat, n;
330         snd_mask_t sformat_mask;
331         snd_mask_t mask;
332
333         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
334         params = kmalloc(sizeof(*params), GFP_KERNEL);
335         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
336         if (!sw_params || !params || !sparams) {
337                 snd_printd("No memory\n");
338                 err = -ENOMEM;
339                 goto failure;
340         }
341
342         if (atomic_read(&runtime->mmap_count)) {
343                 direct = 1;
344         } else {
345                 snd_pcm_oss_setup_t *setup = substream->oss.setup;
346                 direct = (setup != NULL && setup->direct);
347         }
348
349         _snd_pcm_hw_params_any(sparams);
350         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
351         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
352         snd_mask_none(&mask);
353         if (atomic_read(&runtime->mmap_count))
354                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
355         else {
356                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
357                 if (!direct)
358                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
359         }
360         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
361         if (err < 0) {
362                 snd_printd("No usable accesses\n");
363                 err = -EINVAL;
364                 goto failure;
365         }
366         choose_rate(substream, sparams, runtime->oss.rate);
367         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
368
369         format = snd_pcm_oss_format_from(runtime->oss.format);
370
371         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
372         if (direct)
373                 sformat = format;
374         else
375                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
376
377         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
378                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
379                         if (snd_mask_test(&sformat_mask, sformat) &&
380                             snd_pcm_oss_format_to(sformat) >= 0)
381                                 break;
382                 }
383                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
384                         snd_printd("Cannot find a format!!!\n");
385                         err = -EINVAL;
386                         goto failure;
387                 }
388         }
389         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
390         snd_assert(err >= 0, goto failure);
391
392         if (direct) {
393                 memcpy(params, sparams, sizeof(*params));
394         } else {
395                 _snd_pcm_hw_params_any(params);
396                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
397                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
398                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
399                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
400                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
401                                       runtime->oss.channels, 0);
402                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
403                                       runtime->oss.rate, 0);
404                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
405                          params_access(params), params_format(params),
406                          params_channels(params), params_rate(params));
407         }
408         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
409                  params_access(sparams), params_format(sparams),
410                  params_channels(sparams), params_rate(sparams));
411
412         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
413                          params_channels(params) / 8;
414
415         snd_pcm_oss_plugin_clear(substream);
416         if (!direct) {
417                 /* add necessary plugins */
418                 snd_pcm_oss_plugin_clear(substream);
419                 if ((err = snd_pcm_plug_format_plugins(substream,
420                                                        params, 
421                                                        sparams)) < 0) {
422                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
423                         snd_pcm_oss_plugin_clear(substream);
424                         goto failure;
425                 }
426                 if (runtime->oss.plugin_first) {
427                         snd_pcm_plugin_t *plugin;
428                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
429                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
430                                 snd_pcm_oss_plugin_clear(substream);
431                                 goto failure;
432                         }
433                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
434                                 err = snd_pcm_plugin_append(plugin);
435                         } else {
436                                 err = snd_pcm_plugin_insert(plugin);
437                         }
438                         if (err < 0) {
439                                 snd_pcm_oss_plugin_clear(substream);
440                                 goto failure;
441                         }
442                 }
443         }
444
445         err = snd_pcm_oss_period_size(substream, params, sparams);
446         if (err < 0)
447                 goto failure;
448
449         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
450         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
451         snd_assert(err >= 0, goto failure);
452
453         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
454                                      runtime->oss.periods, NULL);
455         snd_assert(err >= 0, goto failure);
456
457         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
458
459         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
460                 snd_printd("HW_PARAMS failed: %i\n", err);
461                 goto failure;
462         }
463
464         memset(sw_params, 0, sizeof(*sw_params));
465         if (runtime->oss.trigger) {
466                 sw_params->start_threshold = 1;
467         } else {
468                 sw_params->start_threshold = runtime->boundary;
469         }
470         if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
471                 sw_params->stop_threshold = runtime->boundary;
472         else
473                 sw_params->stop_threshold = runtime->buffer_size;
474         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
475         sw_params->period_step = 1;
476         sw_params->sleep_min = 0;
477         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
478                 1 : runtime->period_size;
479         sw_params->xfer_align = 1;
480         if (atomic_read(&runtime->mmap_count) ||
481             (substream->oss.setup && substream->oss.setup->nosilence)) {
482                 sw_params->silence_threshold = 0;
483                 sw_params->silence_size = 0;
484         } else {
485                 snd_pcm_uframes_t frames;
486                 frames = runtime->period_size + 16;
487                 if (frames > runtime->buffer_size)
488                         frames = runtime->buffer_size;
489                 sw_params->silence_threshold = frames;
490                 sw_params->silence_size = frames;
491         }
492
493         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
494                 snd_printd("SW_PARAMS failed: %i\n", err);
495                 goto failure;
496         }
497
498         runtime->oss.periods = params_periods(sparams);
499         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
500         snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
501         if (runtime->oss.plugin_first) {
502                 err = snd_pcm_plug_alloc(substream, oss_period_size);
503                 if (err < 0)
504                         goto failure;
505         }
506         oss_period_size *= oss_frame_size;
507
508         oss_buffer_size = oss_period_size * runtime->oss.periods;
509         snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
510
511         runtime->oss.period_bytes = oss_period_size;
512         runtime->oss.buffer_bytes = oss_buffer_size;
513
514         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
515                  runtime->oss.period_bytes,
516                  runtime->oss.buffer_bytes);
517         pdprintf("slave: period_size = %i, buffer_size = %i\n",
518                  params_period_size(sparams),
519                  params_buffer_size(sparams));
520
521         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
522         runtime->oss.channels = params_channels(params);
523         runtime->oss.rate = params_rate(params);
524
525         runtime->oss.params = 0;
526         runtime->oss.prepare = 1;
527         vfree(runtime->oss.buffer);
528         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
529         runtime->oss.buffer_used = 0;
530         if (runtime->dma_area)
531                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
532
533         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
534
535         err = 0;
536 failure:
537         kfree(sw_params);
538         kfree(params);
539         kfree(sparams);
540         return err;
541 }
542
543 static int snd_pcm_oss_get_active_substream(snd_pcm_oss_file_t *pcm_oss_file, snd_pcm_substream_t **r_substream)
544 {
545         int idx, err;
546         snd_pcm_substream_t *asubstream = NULL, *substream;
547
548         for (idx = 0; idx < 2; idx++) {
549                 substream = pcm_oss_file->streams[idx];
550                 if (substream == NULL)
551                         continue;
552                 if (asubstream == NULL)
553                         asubstream = substream;
554                 if (substream->runtime->oss.params) {
555                         err = snd_pcm_oss_change_params(substream);
556                         if (err < 0)
557                                 return err;
558                 }
559         }
560         snd_assert(asubstream != NULL, return -EIO);
561         if (r_substream)
562                 *r_substream = asubstream;
563         return 0;
564 }
565
566 static int snd_pcm_oss_prepare(snd_pcm_substream_t *substream)
567 {
568         int err;
569         snd_pcm_runtime_t *runtime = substream->runtime;
570
571         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
572         if (err < 0) {
573                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
574                 return err;
575         }
576         runtime->oss.prepare = 0;
577         runtime->oss.prev_hw_ptr_interrupt = 0;
578         runtime->oss.period_ptr = 0;
579         runtime->oss.buffer_used = 0;
580
581         return 0;
582 }
583
584 static int snd_pcm_oss_make_ready(snd_pcm_substream_t *substream)
585 {
586         snd_pcm_runtime_t *runtime;
587         int err;
588
589         if (substream == NULL)
590                 return 0;
591         runtime = substream->runtime;
592         if (runtime->oss.params) {
593                 err = snd_pcm_oss_change_params(substream);
594                 if (err < 0)
595                         return err;
596         }
597         if (runtime->oss.prepare) {
598                 err = snd_pcm_oss_prepare(substream);
599                 if (err < 0)
600                         return err;
601         }
602         return 0;
603 }
604
605 static int snd_pcm_oss_capture_position_fixup(snd_pcm_substream_t *substream, snd_pcm_sframes_t *delay)
606 {
607         snd_pcm_runtime_t *runtime;
608         snd_pcm_uframes_t frames;
609         int err = 0;
610
611         while (1) {
612                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
613                 if (err < 0)
614                         break;
615                 runtime = substream->runtime;
616                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
617                         break;
618                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
619                 /* until avail(delay) <= buffer_size */
620                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
621                 frames /= runtime->period_size;
622                 frames *= runtime->period_size;
623                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
624                 if (err < 0)
625                         break;
626         }
627         return err;
628 }
629
630 snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
631 {
632         snd_pcm_runtime_t *runtime = substream->runtime;
633         int ret;
634         while (1) {
635                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
636                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
637 #ifdef OSS_DEBUG
638                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
639                                 printk("pcm_oss: write: recovering from XRUN\n");
640                         else
641                                 printk("pcm_oss: write: recovering from SUSPEND\n");
642 #endif
643                         ret = snd_pcm_oss_prepare(substream);
644                         if (ret < 0)
645                                 break;
646                 }
647                 if (in_kernel) {
648                         mm_segment_t fs;
649                         fs = snd_enter_user();
650                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
651                         snd_leave_user(fs);
652                 } else {
653                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
654                 }
655                 if (ret != -EPIPE && ret != -ESTRPIPE)
656                         break;
657                 /* test, if we can't store new data, because the stream */
658                 /* has not been started */
659                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
660                         return -EAGAIN;
661         }
662         return ret;
663 }
664
665 snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
666 {
667         snd_pcm_runtime_t *runtime = substream->runtime;
668         snd_pcm_sframes_t delay;
669         int ret;
670         while (1) {
671                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
672                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
673 #ifdef OSS_DEBUG
674                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
675                                 printk("pcm_oss: read: recovering from XRUN\n");
676                         else
677                                 printk("pcm_oss: read: recovering from SUSPEND\n");
678 #endif
679                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
680                         if (ret < 0)
681                                 break;
682                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
683                         ret = snd_pcm_oss_prepare(substream);
684                         if (ret < 0)
685                                 break;
686                 }
687                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
688                 if (ret < 0)
689                         break;
690                 if (in_kernel) {
691                         mm_segment_t fs;
692                         fs = snd_enter_user();
693                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
694                         snd_leave_user(fs);
695                 } else {
696                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
697                 }
698                 if (ret == -EPIPE) {
699                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
700                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
701                                 if (ret < 0)
702                                         break;
703                         }
704                         continue;
705                 }
706                 if (ret != -ESTRPIPE)
707                         break;
708         }
709         return ret;
710 }
711
712 snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
713 {
714         snd_pcm_runtime_t *runtime = substream->runtime;
715         int ret;
716         while (1) {
717                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
718                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
719 #ifdef OSS_DEBUG
720                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
721                                 printk("pcm_oss: writev: recovering from XRUN\n");
722                         else
723                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
724 #endif
725                         ret = snd_pcm_oss_prepare(substream);
726                         if (ret < 0)
727                                 break;
728                 }
729                 if (in_kernel) {
730                         mm_segment_t fs;
731                         fs = snd_enter_user();
732                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
733                         snd_leave_user(fs);
734                 } else {
735                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
736                 }
737                 if (ret != -EPIPE && ret != -ESTRPIPE)
738                         break;
739
740                 /* test, if we can't store new data, because the stream */
741                 /* has not been started */
742                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
743                         return -EAGAIN;
744         }
745         return ret;
746 }
747         
748 snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
749 {
750         snd_pcm_runtime_t *runtime = substream->runtime;
751         int ret;
752         while (1) {
753                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
754                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
755 #ifdef OSS_DEBUG
756                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
757                                 printk("pcm_oss: readv: recovering from XRUN\n");
758                         else
759                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
760 #endif
761                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
762                         if (ret < 0)
763                                 break;
764                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
765                         ret = snd_pcm_oss_prepare(substream);
766                         if (ret < 0)
767                                 break;
768                 }
769                 if (in_kernel) {
770                         mm_segment_t fs;
771                         fs = snd_enter_user();
772                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
773                         snd_leave_user(fs);
774                 } else {
775                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
776                 }
777                 if (ret != -EPIPE && ret != -ESTRPIPE)
778                         break;
779         }
780         return ret;
781 }
782
783 static ssize_t snd_pcm_oss_write2(snd_pcm_substream_t *substream, const char *buf, size_t bytes, int in_kernel)
784 {
785         snd_pcm_runtime_t *runtime = substream->runtime;
786         snd_pcm_sframes_t frames, frames1;
787         if (runtime->oss.plugin_first) {
788                 snd_pcm_plugin_channel_t *channels;
789                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
790                 if (!in_kernel) {
791                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
792                                 return -EFAULT;
793                         buf = runtime->oss.buffer;
794                 }
795                 frames = bytes / oss_frame_bytes;
796                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
797                 if (frames1 < 0)
798                         return frames1;
799                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
800                 if (frames1 <= 0)
801                         return frames1;
802                 bytes = frames1 * oss_frame_bytes;
803         } else {
804                 frames = bytes_to_frames(runtime, bytes);
805                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
806                 if (frames1 <= 0)
807                         return frames1;
808                 bytes = frames_to_bytes(runtime, frames1);
809         }
810         return bytes;
811 }
812
813 static ssize_t snd_pcm_oss_write1(snd_pcm_substream_t *substream, const char __user *buf, size_t bytes)
814 {
815         size_t xfer = 0;
816         ssize_t tmp;
817         snd_pcm_runtime_t *runtime = substream->runtime;
818
819         if (atomic_read(&runtime->mmap_count))
820                 return -ENXIO;
821
822         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
823                 return tmp;
824         while (bytes > 0) {
825                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
826                         tmp = bytes;
827                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
828                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
829                         if (tmp > 0) {
830                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
831                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
832                         }
833                         runtime->oss.buffer_used += tmp;
834                         buf += tmp;
835                         bytes -= tmp;
836                         xfer += tmp;
837                         if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
838                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
839                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 
840                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
841                                 if (tmp <= 0)
842                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
843                                 runtime->oss.bytes += tmp;
844                                 runtime->oss.period_ptr += tmp;
845                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
846                                 if (runtime->oss.period_ptr == 0 ||
847                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
848                                         runtime->oss.buffer_used = 0;
849                                 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
850                                         return xfer > 0 ? xfer : -EAGAIN;
851                         }
852                 } else {
853                         tmp = snd_pcm_oss_write2(substream,
854                                                  (const char __force *)buf,
855                                                  runtime->oss.period_bytes, 0);
856                         if (tmp <= 0)
857                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
858                         runtime->oss.bytes += tmp;
859                         buf += tmp;
860                         bytes -= tmp;
861                         xfer += tmp;
862                         if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
863                             tmp != runtime->oss.period_bytes)
864                                 break;
865                 }
866         }
867         return xfer;
868 }
869
870 static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel)
871 {
872         snd_pcm_runtime_t *runtime = substream->runtime;
873         snd_pcm_sframes_t frames, frames1;
874         char __user *final_dst = (char __user *)buf;
875         if (runtime->oss.plugin_first) {
876                 snd_pcm_plugin_channel_t *channels;
877                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
878                 if (!in_kernel)
879                         buf = runtime->oss.buffer;
880                 frames = bytes / oss_frame_bytes;
881                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
882                 if (frames1 < 0)
883                         return frames1;
884                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
885                 if (frames1 <= 0)
886                         return frames1;
887                 bytes = frames1 * oss_frame_bytes;
888                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
889                         return -EFAULT;
890         } else {
891                 frames = bytes_to_frames(runtime, bytes);
892                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
893                 if (frames1 <= 0)
894                         return frames1;
895                 bytes = frames_to_bytes(runtime, frames1);
896         }
897         return bytes;
898 }
899
900 static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes)
901 {
902         size_t xfer = 0;
903         ssize_t tmp;
904         snd_pcm_runtime_t *runtime = substream->runtime;
905
906         if (atomic_read(&runtime->mmap_count))
907                 return -ENXIO;
908
909         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
910                 return tmp;
911         while (bytes > 0) {
912                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
913                         if (runtime->oss.buffer_used == 0) {
914                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
915                                 if (tmp <= 0)
916                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
917                                 runtime->oss.bytes += tmp;
918                                 runtime->oss.period_ptr = tmp;
919                                 runtime->oss.buffer_used = tmp;
920                         }
921                         tmp = bytes;
922                         if ((size_t) tmp > runtime->oss.buffer_used)
923                                 tmp = runtime->oss.buffer_used;
924                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
925                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
926                         buf += tmp;
927                         bytes -= tmp;
928                         xfer += tmp;
929                         runtime->oss.buffer_used -= tmp;
930                 } else {
931                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
932                                                 runtime->oss.period_bytes, 0);
933                         if (tmp <= 0)
934                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
935                         runtime->oss.bytes += tmp;
936                         buf += tmp;
937                         bytes -= tmp;
938                         xfer += tmp;
939                 }
940         }
941         return xfer;
942 }
943
944 static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file)
945 {
946         snd_pcm_substream_t *substream;
947
948         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
949         if (substream != NULL) {
950                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
951                 substream->runtime->oss.prepare = 1;
952         }
953         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
954         if (substream != NULL) {
955                 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
956                 substream->runtime->oss.prepare = 1;
957         }
958         return 0;
959 }
960
961 static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file)
962 {
963         snd_pcm_substream_t *substream;
964         int err;
965
966         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
967         if (substream != NULL) {
968                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
969                         return err;
970                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
971         }
972         /* note: all errors from the start action are ignored */
973         /* OSS apps do not know, how to handle them */
974         return 0;
975 }
976
977 static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size)
978 {
979         snd_pcm_runtime_t *runtime;
980         ssize_t result = 0;
981         long res;
982         wait_queue_t wait;
983
984         runtime = substream->runtime;
985         init_waitqueue_entry(&wait, current);
986         add_wait_queue(&runtime->sleep, &wait);
987 #ifdef OSS_DEBUG
988         printk("sync1: size = %li\n", size);
989 #endif
990         while (1) {
991                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
992                 if (result > 0) {
993                         runtime->oss.buffer_used = 0;
994                         result = 0;
995                         break;
996                 }
997                 if (result != 0 && result != -EAGAIN)
998                         break;
999                 result = 0;
1000                 set_current_state(TASK_INTERRUPTIBLE);
1001                 snd_pcm_stream_lock_irq(substream);
1002                 res = runtime->status->state;
1003                 snd_pcm_stream_unlock_irq(substream);
1004                 if (res != SNDRV_PCM_STATE_RUNNING) {
1005                         set_current_state(TASK_RUNNING);
1006                         break;
1007                 }
1008                 res = schedule_timeout(10 * HZ);
1009                 if (signal_pending(current)) {
1010                         result = -ERESTARTSYS;
1011                         break;
1012                 }
1013                 if (res == 0) {
1014                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1015                         result = -EIO;
1016                         break;
1017                 }
1018         }
1019         remove_wait_queue(&runtime->sleep, &wait);
1020         return result;
1021 }
1022
1023 static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file)
1024 {
1025         int err = 0;
1026         unsigned int saved_f_flags;
1027         snd_pcm_substream_t *substream;
1028         snd_pcm_runtime_t *runtime;
1029         snd_pcm_format_t format;
1030         unsigned long width;
1031         size_t size;
1032
1033         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1034         if (substream != NULL) {
1035                 runtime = substream->runtime;
1036                 if (atomic_read(&runtime->mmap_count))
1037                         goto __direct;
1038                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1039                         return err;
1040                 format = snd_pcm_oss_format_from(runtime->oss.format);
1041                 width = snd_pcm_format_physical_width(format);
1042                 if (runtime->oss.buffer_used > 0) {
1043 #ifdef OSS_DEBUG
1044                         printk("sync: buffer_used\n");
1045 #endif
1046                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1047                         snd_pcm_format_set_silence(format,
1048                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1049                                                    size);
1050                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1051                         if (err < 0)
1052                                 return err;
1053                 } else if (runtime->oss.period_ptr > 0) {
1054 #ifdef OSS_DEBUG
1055                         printk("sync: period_ptr\n");
1056 #endif
1057                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1058                         snd_pcm_format_set_silence(format,
1059                                                    runtime->oss.buffer,
1060                                                    size * 8 / width);
1061                         err = snd_pcm_oss_sync1(substream, size);
1062                         if (err < 0)
1063                                 return err;
1064                 }
1065                 /*
1066                  * The ALSA's period might be a bit large than OSS one.
1067                  * Fill the remain portion of ALSA period with zeros.
1068                  */
1069                 size = runtime->control->appl_ptr % runtime->period_size;
1070                 if (size > 0) {
1071                         size = runtime->period_size - size;
1072                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1073                                 size = (runtime->frame_bits * size) / 8;
1074                                 while (size > 0) {
1075                                         mm_segment_t fs;
1076                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1077                                         size -= size1;
1078                                         size1 *= 8;
1079                                         size1 /= runtime->sample_bits;
1080                                         snd_pcm_format_set_silence(runtime->format,
1081                                                                    runtime->oss.buffer,
1082                                                                    size1);
1083                                         fs = snd_enter_user();
1084                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1085                                         snd_leave_user(fs);
1086                                 }
1087                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1088                                 void __user *buffers[runtime->channels];
1089                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1090                                 snd_pcm_lib_writev(substream, buffers, size);
1091                         }
1092                 }
1093                 /*
1094                  * finish sync: drain the buffer
1095                  */
1096               __direct:
1097                 saved_f_flags = substream->ffile->f_flags;
1098                 substream->ffile->f_flags &= ~O_NONBLOCK;
1099                 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1100                 substream->ffile->f_flags = saved_f_flags;
1101                 if (err < 0)
1102                         return err;
1103                 runtime->oss.prepare = 1;
1104         }
1105
1106         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1107         if (substream != NULL) {
1108                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1109                         return err;
1110                 runtime = substream->runtime;
1111                 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1112                 if (err < 0)
1113                         return err;
1114                 runtime->oss.buffer_used = 0;
1115                 runtime->oss.prepare = 1;
1116         }
1117         return 0;
1118 }
1119
1120 static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate)
1121 {
1122         int idx;
1123
1124         for (idx = 1; idx >= 0; --idx) {
1125                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1126                 snd_pcm_runtime_t *runtime;
1127                 if (substream == NULL)
1128                         continue;
1129                 runtime = substream->runtime;
1130                 if (rate < 1000)
1131                         rate = 1000;
1132                 else if (rate > 192000)
1133                         rate = 192000;
1134                 if (runtime->oss.rate != rate) {
1135                         runtime->oss.params = 1;
1136                         runtime->oss.rate = rate;
1137                 }
1138         }
1139         return snd_pcm_oss_get_rate(pcm_oss_file);
1140 }
1141
1142 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file)
1143 {
1144         snd_pcm_substream_t *substream;
1145         int err;
1146         
1147         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1148                 return err;
1149         return substream->runtime->oss.rate;
1150 }
1151
1152 static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels)
1153 {
1154         int idx;
1155         if (channels < 1)
1156                 channels = 1;
1157         if (channels > 128)
1158                 return -EINVAL;
1159         for (idx = 1; idx >= 0; --idx) {
1160                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1161                 snd_pcm_runtime_t *runtime;
1162                 if (substream == NULL)
1163                         continue;
1164                 runtime = substream->runtime;
1165                 if (runtime->oss.channels != channels) {
1166                         runtime->oss.params = 1;
1167                         runtime->oss.channels = channels;
1168                 }
1169         }
1170         return snd_pcm_oss_get_channels(pcm_oss_file);
1171 }
1172
1173 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file)
1174 {
1175         snd_pcm_substream_t *substream;
1176         int err;
1177         
1178         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1179                 return err;
1180         return substream->runtime->oss.channels;
1181 }
1182
1183 static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file)
1184 {
1185         snd_pcm_substream_t *substream;
1186         int err;
1187         
1188         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1189                 return err;
1190         return substream->runtime->oss.period_bytes;
1191 }
1192
1193 static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file)
1194 {
1195         snd_pcm_substream_t *substream;
1196         int err;
1197         int direct;
1198         snd_pcm_hw_params_t *params;
1199         unsigned int formats = 0;
1200         snd_mask_t format_mask;
1201         int fmt;
1202
1203         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1204                 return err;
1205         if (atomic_read(&substream->runtime->mmap_count)) {
1206                 direct = 1;
1207         } else {
1208                 snd_pcm_oss_setup_t *setup = substream->oss.setup;
1209                 direct = (setup != NULL && setup->direct);
1210         }
1211         if (!direct)
1212                 return AFMT_MU_LAW | AFMT_U8 |
1213                        AFMT_S16_LE | AFMT_S16_BE |
1214                        AFMT_S8 | AFMT_U16_LE |
1215                        AFMT_U16_BE;
1216         params = kmalloc(sizeof(*params), GFP_KERNEL);
1217         if (!params)
1218                 return -ENOMEM;
1219         _snd_pcm_hw_params_any(params);
1220         err = snd_pcm_hw_refine(substream, params);
1221         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 
1222         kfree(params);
1223         snd_assert(err >= 0, return err);
1224         for (fmt = 0; fmt < 32; ++fmt) {
1225                 if (snd_mask_test(&format_mask, fmt)) {
1226                         int f = snd_pcm_oss_format_to(fmt);
1227                         if (f >= 0)
1228                                 formats |= f;
1229                 }
1230         }
1231         return formats;
1232 }
1233
1234 static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format)
1235 {
1236         int formats, idx;
1237         
1238         if (format != AFMT_QUERY) {
1239                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1240                 if (!(formats & format))
1241                         format = AFMT_U8;
1242                 for (idx = 1; idx >= 0; --idx) {
1243                         snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1244                         snd_pcm_runtime_t *runtime;
1245                         if (substream == NULL)
1246                                 continue;
1247                         runtime = substream->runtime;
1248                         if (runtime->oss.format != format) {
1249                                 runtime->oss.params = 1;
1250                                 runtime->oss.format = format;
1251                         }
1252                 }
1253         }
1254         return snd_pcm_oss_get_format(pcm_oss_file);
1255 }
1256
1257 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file)
1258 {
1259         snd_pcm_substream_t *substream;
1260         int err;
1261         
1262         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1263                 return err;
1264         return substream->runtime->oss.format;
1265 }
1266
1267 static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide)
1268 {
1269         snd_pcm_runtime_t *runtime;
1270
1271         if (substream == NULL)
1272                 return 0;
1273         runtime = substream->runtime;
1274         if (subdivide == 0) {
1275                 subdivide = runtime->oss.subdivision;
1276                 if (subdivide == 0)
1277                         subdivide = 1;
1278                 return subdivide;
1279         }
1280         if (runtime->oss.subdivision || runtime->oss.fragshift)
1281                 return -EINVAL;
1282         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1283             subdivide != 8 && subdivide != 16)
1284                 return -EINVAL;
1285         runtime->oss.subdivision = subdivide;
1286         runtime->oss.params = 1;
1287         return subdivide;
1288 }
1289
1290 static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide)
1291 {
1292         int err = -EINVAL, idx;
1293
1294         for (idx = 1; idx >= 0; --idx) {
1295                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1296                 if (substream == NULL)
1297                         continue;
1298                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1299                         return err;
1300         }
1301         return err;
1302 }
1303
1304 static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val)
1305 {
1306         snd_pcm_runtime_t *runtime;
1307
1308         if (substream == NULL)
1309                 return 0;
1310         runtime = substream->runtime;
1311         if (runtime->oss.subdivision || runtime->oss.fragshift)
1312                 return -EINVAL;
1313         runtime->oss.fragshift = val & 0xffff;
1314         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1315         if (runtime->oss.fragshift < 4)         /* < 16 */
1316                 runtime->oss.fragshift = 4;
1317         if (runtime->oss.maxfrags < 2)
1318                 runtime->oss.maxfrags = 2;
1319         runtime->oss.params = 1;
1320         return 0;
1321 }
1322
1323 static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val)
1324 {
1325         int err = -EINVAL, idx;
1326
1327         for (idx = 1; idx >= 0; --idx) {
1328                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1329                 if (substream == NULL)
1330                         continue;
1331                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1332                         return err;
1333         }
1334         return err;
1335 }
1336
1337 static int snd_pcm_oss_nonblock(struct file * file)
1338 {
1339         file->f_flags |= O_NONBLOCK;
1340         return 0;
1341 }
1342
1343 static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res)
1344 {
1345
1346         if (substream == NULL) {
1347                 res &= ~DSP_CAP_DUPLEX;
1348                 return res;
1349         }
1350 #ifdef DSP_CAP_MULTI
1351         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1352                 if (substream->pstr->substream_count > 1)
1353                         res |= DSP_CAP_MULTI;
1354 #endif
1355         /* DSP_CAP_REALTIME is set all times: */
1356         /* all ALSA drivers can return actual pointer in ring buffer */
1357 #if defined(DSP_CAP_REALTIME) && 0
1358         {
1359                 snd_pcm_runtime_t *runtime = substream->runtime;
1360                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1361                         res &= ~DSP_CAP_REALTIME;
1362         }
1363 #endif
1364         return res;
1365 }
1366
1367 static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file)
1368 {
1369         int result, idx;
1370         
1371         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1372         for (idx = 0; idx < 2; idx++) {
1373                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1374                 result = snd_pcm_oss_get_caps1(substream, result);
1375         }
1376         result |= 0x0001;       /* revision - same as SB AWE 64 */
1377         return result;
1378 }
1379
1380 static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr)
1381 {
1382         snd_pcm_runtime_t *runtime = substream->runtime;
1383         snd_pcm_uframes_t appl_ptr;
1384         appl_ptr = hw_ptr + runtime->buffer_size;
1385         appl_ptr %= runtime->boundary;
1386         runtime->control->appl_ptr = appl_ptr;
1387 }
1388
1389 static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger)
1390 {
1391         snd_pcm_runtime_t *runtime;
1392         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1393         int err, cmd;
1394
1395 #ifdef OSS_DEBUG
1396         printk("pcm_oss: trigger = 0x%x\n", trigger);
1397 #endif
1398         
1399         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1400         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1401
1402         if (psubstream) {
1403                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1404                         return err;
1405         }
1406         if (csubstream) {
1407                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1408                         return err;
1409         }
1410         if (psubstream) {
1411                 runtime = psubstream->runtime;
1412                 if (trigger & PCM_ENABLE_OUTPUT) {
1413                         if (runtime->oss.trigger)
1414                                 goto _skip1;
1415                         if (atomic_read(&psubstream->runtime->mmap_count))
1416                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1417                         runtime->oss.trigger = 1;
1418                         runtime->start_threshold = 1;
1419                         cmd = SNDRV_PCM_IOCTL_START;
1420                 } else {
1421                         if (!runtime->oss.trigger)
1422                                 goto _skip1;
1423                         runtime->oss.trigger = 0;
1424                         runtime->start_threshold = runtime->boundary;
1425                         cmd = SNDRV_PCM_IOCTL_DROP;
1426                         runtime->oss.prepare = 1;
1427                 }
1428                 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1429                 if (err < 0)
1430                         return err;
1431         }
1432  _skip1:
1433         if (csubstream) {
1434                 runtime = csubstream->runtime;
1435                 if (trigger & PCM_ENABLE_INPUT) {
1436                         if (runtime->oss.trigger)
1437                                 goto _skip2;
1438                         runtime->oss.trigger = 1;
1439                         runtime->start_threshold = 1;
1440                         cmd = SNDRV_PCM_IOCTL_START;
1441                 } else {
1442                         if (!runtime->oss.trigger)
1443                                 goto _skip2;
1444                         runtime->oss.trigger = 0;
1445                         runtime->start_threshold = runtime->boundary;
1446                         cmd = SNDRV_PCM_IOCTL_DROP;
1447                         runtime->oss.prepare = 1;
1448                 }
1449                 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1450                 if (err < 0)
1451                         return err;
1452         }
1453  _skip2:
1454         return 0;
1455 }
1456
1457 static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file)
1458 {
1459         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1460         int result = 0;
1461
1462         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1463         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1464         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1465                 result |= PCM_ENABLE_OUTPUT;
1466         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1467                 result |= PCM_ENABLE_INPUT;
1468         return result;
1469 }
1470
1471 static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file)
1472 {
1473         snd_pcm_substream_t *substream;
1474         snd_pcm_runtime_t *runtime;
1475         snd_pcm_sframes_t delay;
1476         int err;
1477
1478         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1479         if (substream == NULL)
1480                 return -EINVAL;
1481         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1482                 return err;
1483         runtime = substream->runtime;
1484         if (runtime->oss.params || runtime->oss.prepare)
1485                 return 0;
1486         err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1487         if (err == -EPIPE)
1488                 delay = 0;      /* hack for broken OSS applications */
1489         else if (err < 0)
1490                 return err;
1491         return snd_pcm_oss_bytes(substream, delay);
1492 }
1493
1494 static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info)
1495 {       
1496         snd_pcm_substream_t *substream;
1497         snd_pcm_runtime_t *runtime;
1498         snd_pcm_sframes_t delay;
1499         int fixup;
1500         struct count_info info;
1501         int err;
1502
1503         if (_info == NULL)
1504                 return -EFAULT;
1505         substream = pcm_oss_file->streams[stream];
1506         if (substream == NULL)
1507                 return -EINVAL;
1508         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1509                 return err;
1510         runtime = substream->runtime;
1511         if (runtime->oss.params || runtime->oss.prepare) {
1512                 memset(&info, 0, sizeof(info));
1513                 if (copy_to_user(_info, &info, sizeof(info)))
1514                         return -EFAULT;
1515                 return 0;
1516         }
1517         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1518                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1519                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1520                         err = 0;
1521                         delay = 0;
1522                         fixup = 0;
1523                 } else {
1524                         fixup = runtime->oss.buffer_used;
1525                 }
1526         } else {
1527                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1528                 fixup = -runtime->oss.buffer_used;
1529         }
1530         if (err < 0)
1531                 return err;
1532         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1533         if (atomic_read(&runtime->mmap_count)) {
1534                 snd_pcm_sframes_t n;
1535                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1536                 if (n < 0)
1537                         n += runtime->boundary;
1538                 info.blocks = n / runtime->period_size;
1539                 runtime->oss.prev_hw_ptr_interrupt = delay;
1540                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1541                         snd_pcm_oss_simulate_fill(substream, delay);
1542                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1543         } else {
1544                 delay = snd_pcm_oss_bytes(substream, delay);
1545                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1546                         snd_pcm_oss_setup_t *setup = substream->oss.setup;
1547                         if (setup && setup->buggyptr)
1548                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1549                         else
1550                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1551                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1552                 } else {
1553                         delay += fixup;
1554                         info.blocks = delay / runtime->oss.period_bytes;
1555                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1556                 }
1557         }
1558         if (copy_to_user(_info, &info, sizeof(info)))
1559                 return -EFAULT;
1560         return 0;
1561 }
1562
1563 static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1564 {
1565         snd_pcm_substream_t *substream;
1566         snd_pcm_runtime_t *runtime;
1567         snd_pcm_sframes_t avail;
1568         int fixup;
1569         struct audio_buf_info info;
1570         int err;
1571
1572         if (_info == NULL)
1573                 return -EFAULT;
1574         substream = pcm_oss_file->streams[stream];
1575         if (substream == NULL)
1576                 return -EINVAL;
1577         runtime = substream->runtime;
1578
1579         if (runtime->oss.params &&
1580             (err = snd_pcm_oss_change_params(substream)) < 0)
1581                 return err;
1582
1583         info.fragsize = runtime->oss.period_bytes;
1584         info.fragstotal = runtime->periods;
1585         if (runtime->oss.prepare) {
1586                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1587                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1588                         info.fragments = runtime->oss.periods;
1589                 } else {
1590                         info.bytes = 0;
1591                         info.fragments = 0;
1592                 }
1593         } else {
1594                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1595                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1596                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1597                                 avail = runtime->buffer_size;
1598                                 err = 0;
1599                                 fixup = 0;
1600                         } else {
1601                                 avail = runtime->buffer_size - avail;
1602                                 fixup = -runtime->oss.buffer_used;
1603                         }
1604                 } else {
1605                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1606                         fixup = runtime->oss.buffer_used;
1607                 }
1608                 if (err < 0)
1609                         return err;
1610                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1611                 info.fragments = info.bytes / runtime->oss.period_bytes;
1612         }
1613
1614 #ifdef OSS_DEBUG
1615         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1616 #endif
1617         if (copy_to_user(_info, &info, sizeof(info)))
1618                 return -EFAULT;
1619         return 0;
1620 }
1621
1622 static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1623 {
1624         // it won't be probably implemented
1625         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1626         return -EINVAL;
1627 }
1628
1629 static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name)
1630 {
1631         const char *ptr, *ptrl;
1632         snd_pcm_oss_setup_t *setup;
1633
1634         down(&pcm->streams[stream].oss.setup_mutex);
1635         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1636                 if (!strcmp(setup->task_name, task_name)) {
1637                         up(&pcm->streams[stream].oss.setup_mutex);
1638                         return setup;
1639                 }
1640         }
1641         ptr = ptrl = task_name;
1642         while (*ptr) {
1643                 if (*ptr == '/')
1644                         ptrl = ptr + 1;
1645                 ptr++;
1646         }
1647         if (ptrl == task_name) {
1648                 goto __not_found;
1649                 return NULL;
1650         }
1651         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1652                 if (!strcmp(setup->task_name, ptrl)) {
1653                         up(&pcm->streams[stream].oss.setup_mutex);
1654                         return setup;
1655                 }
1656         }
1657       __not_found:
1658         up(&pcm->streams[stream].oss.setup_mutex);
1659         return NULL;
1660 }
1661
1662 static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream,
1663                                        snd_pcm_oss_setup_t *setup,
1664                                        int minor)
1665 {
1666         snd_pcm_runtime_t *runtime;
1667
1668         substream->oss.oss = 1;
1669         substream->oss.setup = setup;
1670         runtime = substream->runtime;
1671         runtime->oss.params = 1;
1672         runtime->oss.trigger = 1;
1673         runtime->oss.rate = 8000;
1674         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1675         case SNDRV_MINOR_OSS_PCM_8:
1676                 runtime->oss.format = AFMT_U8;
1677                 break;
1678         case SNDRV_MINOR_OSS_PCM_16:
1679                 runtime->oss.format = AFMT_S16_LE;
1680                 break;
1681         default:
1682                 runtime->oss.format = AFMT_MU_LAW;
1683         }
1684         runtime->oss.channels = 1;
1685         runtime->oss.fragshift = 0;
1686         runtime->oss.maxfrags = 0;
1687         runtime->oss.subdivision = 0;
1688 }
1689
1690 static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream)
1691 {
1692         snd_pcm_runtime_t *runtime;
1693         runtime = substream->runtime;
1694         vfree(runtime->oss.buffer);
1695         snd_pcm_oss_plugin_clear(substream);
1696         substream->oss.file = NULL;
1697         substream->oss.oss = 0;
1698 }
1699
1700 static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file)
1701 {
1702         int cidx;
1703         snd_assert(pcm_oss_file != NULL, return -ENXIO);
1704         for (cidx = 0; cidx < 2; ++cidx) {
1705                 snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx];
1706                 snd_pcm_runtime_t *runtime;
1707                 if (substream == NULL)
1708                         continue;
1709                 runtime = substream->runtime;
1710                 
1711                 snd_pcm_stream_lock_irq(substream);
1712                 if (snd_pcm_running(substream))
1713                         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1714                 snd_pcm_stream_unlock_irq(substream);
1715                 if (substream->ffile != NULL) {
1716                         if (substream->ops->hw_free != NULL)
1717                                 substream->ops->hw_free(substream);
1718                         substream->ops->close(substream);
1719                         substream->ffile = NULL;
1720                 }
1721                 snd_pcm_oss_release_substream(substream);
1722                 snd_pcm_release_substream(substream);
1723         }
1724         kfree(pcm_oss_file);
1725         return 0;
1726 }
1727
1728 static int snd_pcm_oss_open_file(struct file *file,
1729                                  snd_pcm_t *pcm,
1730                                  snd_pcm_oss_file_t **rpcm_oss_file,
1731                                  int minor,
1732                                  snd_pcm_oss_setup_t *psetup,
1733                                  snd_pcm_oss_setup_t *csetup)
1734 {
1735         int err = 0;
1736         snd_pcm_oss_file_t *pcm_oss_file;
1737         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1738         unsigned int f_mode = file->f_mode;
1739
1740         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1741         *rpcm_oss_file = NULL;
1742
1743         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1744         if (pcm_oss_file == NULL)
1745                 return -ENOMEM;
1746
1747         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1748             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1749                 f_mode = FMODE_WRITE;
1750         if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1751                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1752                                                &psubstream)) < 0) {
1753                         snd_pcm_oss_release_file(pcm_oss_file);
1754                         return err;
1755                 }
1756                 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1757         }
1758         if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1759                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE, 
1760                                                &csubstream)) < 0) {
1761                         if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1762                                 snd_pcm_oss_release_file(pcm_oss_file);
1763                                 return err;
1764                         } else {
1765                                 csubstream = NULL;
1766                         }
1767                 }
1768                 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1769         }
1770         
1771         if (psubstream == NULL && csubstream == NULL) {
1772                 snd_pcm_oss_release_file(pcm_oss_file);
1773                 return -EINVAL;
1774         }
1775         if (psubstream != NULL) {
1776                 psubstream->oss.file = pcm_oss_file;
1777                 err = snd_pcm_hw_constraints_init(psubstream);
1778                 if (err < 0) {
1779                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1780                         snd_pcm_oss_release_file(pcm_oss_file);
1781                         return err;
1782                 }
1783                 if ((err = psubstream->ops->open(psubstream)) < 0) {
1784                         snd_pcm_oss_release_file(pcm_oss_file);
1785                         return err;
1786                 }
1787                 psubstream->ffile = file;
1788                 err = snd_pcm_hw_constraints_complete(psubstream);
1789                 if (err < 0) {
1790                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1791                         snd_pcm_oss_release_file(pcm_oss_file);
1792                         return err;
1793                 }
1794                 snd_pcm_oss_init_substream(psubstream, psetup, minor);
1795         }
1796         if (csubstream != NULL) {
1797                 csubstream->oss.file = pcm_oss_file;
1798                 err = snd_pcm_hw_constraints_init(csubstream);
1799                 if (err < 0) {
1800                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1801                         snd_pcm_oss_release_file(pcm_oss_file);
1802                         return err;
1803                 }
1804                 if ((err = csubstream->ops->open(csubstream)) < 0) {
1805                         snd_pcm_oss_release_file(pcm_oss_file);
1806                         return err;
1807                 }
1808                 csubstream->ffile = file;
1809                 err = snd_pcm_hw_constraints_complete(csubstream);
1810                 if (err < 0) {
1811                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1812                         snd_pcm_oss_release_file(pcm_oss_file);
1813                         return err;
1814                 }
1815                 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1816         }
1817
1818         file->private_data = pcm_oss_file;
1819         *rpcm_oss_file = pcm_oss_file;
1820         return 0;
1821 }
1822
1823
1824 static int snd_task_name(struct task_struct *task, char *name, size_t size)
1825 {
1826         unsigned int idx;
1827
1828         snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
1829         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
1830                 name[idx] = task->comm[idx];
1831         name[idx] = '\0';
1832         return 0;
1833 }
1834
1835 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1836 {
1837         int minor = iminor(inode);
1838         int cardnum = SNDRV_MINOR_OSS_CARD(minor);
1839         int device;
1840         int err;
1841         char task_name[32];
1842         snd_pcm_t *pcm;
1843         snd_pcm_oss_file_t *pcm_oss_file;
1844         snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL;
1845         int nonblock;
1846         wait_queue_t wait;
1847
1848         snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
1849         device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ?
1850                 adsp_map[cardnum] : dsp_map[cardnum];
1851
1852         pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device];
1853         if (pcm == NULL) {
1854                 err = -ENODEV;
1855                 goto __error1;
1856         }
1857         err = snd_card_file_add(pcm->card, file);
1858         if (err < 0)
1859                 goto __error1;
1860         if (!try_module_get(pcm->card->module)) {
1861                 err = -EFAULT;
1862                 goto __error2;
1863         }
1864         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1865                 err = -EFAULT;
1866                 goto __error;
1867         }
1868         if (file->f_mode & FMODE_WRITE)
1869                 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1870         if (file->f_mode & FMODE_READ)
1871                 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1872
1873         nonblock = !!(file->f_flags & O_NONBLOCK);
1874         if (psetup && !psetup->disable) {
1875                 if (psetup->nonblock)
1876                         nonblock = 1;
1877                 else if (psetup->block)
1878                         nonblock = 0;
1879         } else if (csetup && !csetup->disable) {
1880                 if (csetup->nonblock)
1881                         nonblock = 1;
1882                 else if (csetup->block)
1883                         nonblock = 0;
1884         }
1885         if (!nonblock)
1886                 nonblock = nonblock_open;
1887
1888         init_waitqueue_entry(&wait, current);
1889         add_wait_queue(&pcm->open_wait, &wait);
1890         down(&pcm->open_mutex);
1891         while (1) {
1892                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1893                                             minor, psetup, csetup);
1894                 if (err >= 0)
1895                         break;
1896                 if (err == -EAGAIN) {
1897                         if (nonblock) {
1898                                 err = -EBUSY;
1899                                 break;
1900                         }
1901                 } else
1902                         break;
1903                 set_current_state(TASK_INTERRUPTIBLE);
1904                 up(&pcm->open_mutex);
1905                 schedule();
1906                 down(&pcm->open_mutex);
1907                 if (signal_pending(current)) {
1908                         err = -ERESTARTSYS;
1909                         break;
1910                 }
1911         }
1912         remove_wait_queue(&pcm->open_wait, &wait);
1913         up(&pcm->open_mutex);
1914         if (err < 0)
1915                 goto __error;
1916         return err;
1917
1918       __error:
1919         module_put(pcm->card->module);
1920       __error2:
1921         snd_card_file_remove(pcm->card, file);
1922       __error1:
1923         return err;
1924 }
1925
1926 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1927 {
1928         snd_pcm_t *pcm;
1929         snd_pcm_substream_t *substream;
1930         snd_pcm_oss_file_t *pcm_oss_file;
1931
1932         pcm_oss_file = file->private_data;
1933         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1934         if (substream == NULL)
1935                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1936         snd_assert(substream != NULL, return -ENXIO);
1937         pcm = substream->pcm;
1938         snd_pcm_oss_sync(pcm_oss_file);
1939         down(&pcm->open_mutex);
1940         snd_pcm_oss_release_file(pcm_oss_file);
1941         up(&pcm->open_mutex);
1942         wake_up(&pcm->open_wait);
1943         module_put(pcm->card->module);
1944         snd_card_file_remove(pcm->card, file);
1945         return 0;
1946 }
1947
1948 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1949 {
1950         snd_pcm_oss_file_t *pcm_oss_file;
1951         int __user *p = (int __user *)arg;
1952         int res;
1953
1954         pcm_oss_file = file->private_data;
1955         if (cmd == OSS_GETVERSION)
1956                 return put_user(SNDRV_OSS_VERSION, p);
1957         if (cmd == OSS_ALSAEMULVER)
1958                 return put_user(1, p);
1959 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1960         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
1961                 snd_pcm_substream_t *substream;
1962                 int idx;
1963                 for (idx = 0; idx < 2; ++idx) {
1964                         substream = pcm_oss_file->streams[idx];
1965                         if (substream != NULL)
1966                                 break;
1967                 }
1968                 snd_assert(substream != NULL, return -ENXIO);
1969                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1970         }
1971 #endif
1972         if (((cmd >> 8) & 0xff) != 'P')
1973                 return -EINVAL;
1974 #ifdef OSS_DEBUG
1975         printk("pcm_oss: ioctl = 0x%x\n", cmd);
1976 #endif
1977         switch (cmd) {
1978         case SNDCTL_DSP_RESET:
1979                 return snd_pcm_oss_reset(pcm_oss_file);
1980         case SNDCTL_DSP_SYNC:
1981                 return snd_pcm_oss_sync(pcm_oss_file);
1982         case SNDCTL_DSP_SPEED:
1983                 if (get_user(res, p))
1984                         return -EFAULT;
1985                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1986                         return res;
1987                 return put_user(res, p);
1988         case SOUND_PCM_READ_RATE:
1989                 res = snd_pcm_oss_get_rate(pcm_oss_file);
1990                 if (res < 0)
1991                         return res;
1992                 return put_user(res, p);
1993         case SNDCTL_DSP_STEREO:
1994                 if (get_user(res, p))
1995                         return -EFAULT;
1996                 res = res > 0 ? 2 : 1;
1997                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1998                         return res;
1999                 return put_user(--res, p);
2000         case SNDCTL_DSP_GETBLKSIZE:
2001                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2002                 if (res < 0)
2003                         return res;
2004                 return put_user(res, p);
2005         case SNDCTL_DSP_SETFMT:
2006                 if (get_user(res, p))
2007                         return -EFAULT;
2008                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2009                 if (res < 0)
2010                         return res;
2011                 return put_user(res, p);
2012         case SOUND_PCM_READ_BITS:
2013                 res = snd_pcm_oss_get_format(pcm_oss_file);
2014                 if (res < 0)
2015                         return res;
2016                 return put_user(res, p);
2017         case SNDCTL_DSP_CHANNELS:
2018                 if (get_user(res, p))
2019                         return -EFAULT;
2020                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2021                 if (res < 0)
2022                         return res;
2023                 return put_user(res, p);
2024         case SOUND_PCM_READ_CHANNELS:
2025                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2026                 if (res < 0)
2027                         return res;
2028                 return put_user(res, p);
2029         case SOUND_PCM_WRITE_FILTER:
2030         case SOUND_PCM_READ_FILTER:
2031                 return -EIO;
2032         case SNDCTL_DSP_POST:
2033                 return snd_pcm_oss_post(pcm_oss_file);
2034         case SNDCTL_DSP_SUBDIVIDE:
2035                 if (get_user(res, p))
2036                         return -EFAULT;
2037                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2038                 if (res < 0)
2039                         return res;
2040                 return put_user(res, p);
2041         case SNDCTL_DSP_SETFRAGMENT:
2042                 if (get_user(res, p))
2043                         return -EFAULT;
2044                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2045         case SNDCTL_DSP_GETFMTS:
2046                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2047                 if (res < 0)
2048                         return res;
2049                 return put_user(res, p);
2050         case SNDCTL_DSP_GETOSPACE:
2051         case SNDCTL_DSP_GETISPACE:
2052                 return snd_pcm_oss_get_space(pcm_oss_file,
2053                         cmd == SNDCTL_DSP_GETISPACE ?
2054                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2055                         (struct audio_buf_info __user *) arg);
2056         case SNDCTL_DSP_NONBLOCK:
2057                 return snd_pcm_oss_nonblock(file);
2058         case SNDCTL_DSP_GETCAPS:
2059                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2060                 if (res < 0)
2061                         return res;
2062                 return put_user(res, p);
2063         case SNDCTL_DSP_GETTRIGGER:
2064                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2065                 if (res < 0)
2066                         return res;
2067                 return put_user(res, p);
2068         case SNDCTL_DSP_SETTRIGGER:
2069                 if (get_user(res, p))
2070                         return -EFAULT;
2071                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2072         case SNDCTL_DSP_GETIPTR:
2073         case SNDCTL_DSP_GETOPTR:
2074                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2075                         cmd == SNDCTL_DSP_GETIPTR ?
2076                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2077                         (struct count_info __user *) arg);
2078         case SNDCTL_DSP_MAPINBUF:
2079         case SNDCTL_DSP_MAPOUTBUF:
2080                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2081                         cmd == SNDCTL_DSP_MAPINBUF ?
2082                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2083                         (struct buffmem_desc __user *) arg);
2084         case SNDCTL_DSP_SETSYNCRO:
2085                 /* stop DMA now.. */
2086                 return 0;
2087         case SNDCTL_DSP_SETDUPLEX:
2088                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2089                         return 0;
2090                 return -EIO;
2091         case SNDCTL_DSP_GETODELAY:
2092                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2093                 if (res < 0) {
2094                         /* it's for sure, some broken apps don't check for error codes */
2095                         put_user(0, p);
2096                         return res;
2097                 }
2098                 return put_user(res, p);
2099         case SNDCTL_DSP_PROFILE:
2100                 return 0;       /* silently ignore */
2101         default:
2102                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2103         }
2104         return -EINVAL;
2105 }
2106
2107 #ifdef CONFIG_COMPAT
2108 /* all compatible */
2109 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2110 #else
2111 #define snd_pcm_oss_ioctl_compat        NULL
2112 #endif
2113
2114 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2115 {
2116         snd_pcm_oss_file_t *pcm_oss_file;
2117         snd_pcm_substream_t *substream;
2118
2119         pcm_oss_file = file->private_data;
2120         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2121         if (substream == NULL)
2122                 return -ENXIO;
2123 #ifndef OSS_DEBUG
2124         return snd_pcm_oss_read1(substream, buf, count);
2125 #else
2126         {
2127                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2128                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2129                 return res;
2130         }
2131 #endif
2132 }
2133
2134 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2135 {
2136         snd_pcm_oss_file_t *pcm_oss_file;
2137         snd_pcm_substream_t *substream;
2138         long result;
2139
2140         pcm_oss_file = file->private_data;
2141         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2142         if (substream == NULL)
2143                 return -ENXIO;
2144         up(&file->f_dentry->d_inode->i_sem);
2145         result = snd_pcm_oss_write1(substream, buf, count);
2146         down(&file->f_dentry->d_inode->i_sem);
2147 #ifdef OSS_DEBUG
2148         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2149 #endif
2150         return result;
2151 }
2152
2153 static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream)
2154 {
2155         snd_pcm_runtime_t *runtime = substream->runtime;
2156         if (atomic_read(&runtime->mmap_count))
2157                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2158         else
2159                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2160 }
2161
2162 static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream)
2163 {
2164         snd_pcm_runtime_t *runtime = substream->runtime;
2165         if (atomic_read(&runtime->mmap_count))
2166                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2167         else
2168                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2169 }
2170
2171 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2172 {
2173         snd_pcm_oss_file_t *pcm_oss_file;
2174         unsigned int mask;
2175         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
2176         
2177         pcm_oss_file = file->private_data;
2178
2179         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2180         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2181
2182         mask = 0;
2183         if (psubstream != NULL) {
2184                 snd_pcm_runtime_t *runtime = psubstream->runtime;
2185                 poll_wait(file, &runtime->sleep, wait);
2186                 snd_pcm_stream_lock_irq(psubstream);
2187                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2188                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2189                      snd_pcm_oss_playback_ready(psubstream)))
2190                         mask |= POLLOUT | POLLWRNORM;
2191                 snd_pcm_stream_unlock_irq(psubstream);
2192         }
2193         if (csubstream != NULL) {
2194                 snd_pcm_runtime_t *runtime = csubstream->runtime;
2195                 enum sndrv_pcm_state ostate;
2196                 poll_wait(file, &runtime->sleep, wait);
2197                 snd_pcm_stream_lock_irq(csubstream);
2198                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2199                     snd_pcm_oss_capture_ready(csubstream))
2200                         mask |= POLLIN | POLLRDNORM;
2201                 snd_pcm_stream_unlock_irq(csubstream);
2202                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2203                         snd_pcm_oss_file_t ofile;
2204                         memset(&ofile, 0, sizeof(ofile));
2205                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2206                         runtime->oss.trigger = 0;
2207                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2208                 }
2209         }
2210
2211         return mask;
2212 }
2213
2214 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2215 {
2216         snd_pcm_oss_file_t *pcm_oss_file;
2217         snd_pcm_substream_t *substream = NULL;
2218         snd_pcm_runtime_t *runtime;
2219         int err;
2220
2221 #ifdef OSS_DEBUG
2222         printk("pcm_oss: mmap begin\n");
2223 #endif
2224         pcm_oss_file = file->private_data;
2225         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2226         case VM_READ | VM_WRITE:
2227                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2228                 if (substream)
2229                         break;
2230                 /* Fall through */
2231         case VM_READ:
2232                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2233                 break;
2234         case VM_WRITE:
2235                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2236                 break;
2237         default:
2238                 return -EINVAL;
2239         }
2240         /* set VM_READ access as well to fix memset() routines that do
2241            reads before writes (to improve performance) */
2242         area->vm_flags |= VM_READ;
2243         if (substream == NULL)
2244                 return -ENXIO;
2245         runtime = substream->runtime;
2246         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2247                 return -EIO;
2248         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2249                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2250         else
2251                 return -EIO;
2252         
2253         if (runtime->oss.params) {
2254                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2255                         return err;
2256         }
2257         if (runtime->oss.plugin_first != NULL)
2258                 return -EIO;
2259
2260         if (area->vm_pgoff != 0)
2261                 return -EINVAL;
2262
2263         err = snd_pcm_mmap_data(substream, file, area);
2264         if (err < 0)
2265                 return err;
2266         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2267         runtime->silence_threshold = 0;
2268         runtime->silence_size = 0;
2269 #ifdef OSS_DEBUG
2270         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2271 #endif
2272         /* In mmap mode we never stop */
2273         runtime->stop_threshold = runtime->boundary;
2274
2275         return 0;
2276 }
2277
2278 /*
2279  *  /proc interface
2280  */
2281
2282 static void snd_pcm_oss_proc_read(snd_info_entry_t *entry,
2283                                   snd_info_buffer_t * buffer)
2284 {
2285         snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2286         snd_pcm_oss_setup_t *setup = pstr->oss.setup_list;
2287         down(&pstr->oss.setup_mutex);
2288         while (setup) {
2289                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2290                             setup->task_name,
2291                             setup->periods,
2292                             setup->period_size,
2293                             setup->disable ? " disable" : "",
2294                             setup->direct ? " direct" : "",
2295                             setup->block ? " block" : "",
2296                             setup->nonblock ? " non-block" : "",
2297                             setup->partialfrag ? " partial-frag" : "",
2298                             setup->nosilence ? " no-silence" : "");
2299                 setup = setup->next;
2300         }
2301         up(&pstr->oss.setup_mutex);
2302 }
2303
2304 static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr)
2305 {
2306         unsigned int idx;
2307         snd_pcm_substream_t *substream;
2308         snd_pcm_oss_setup_t *setup, *setupn;
2309
2310         for (idx = 0, substream = pstr->substream;
2311              idx < pstr->substream_count; idx++, substream = substream->next)
2312                 substream->oss.setup = NULL;
2313         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2314              setup; setup = setupn) {
2315                 setupn = setup->next;
2316                 kfree(setup->task_name);
2317                 kfree(setup);
2318         }
2319         pstr->oss.setup_list = NULL;
2320 }
2321
2322 static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
2323                                    snd_info_buffer_t * buffer)
2324 {
2325         snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2326         char line[128], str[32], task_name[32], *ptr;
2327         int idx1;
2328         snd_pcm_oss_setup_t *setup, *setup1, template;
2329
2330         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2331                 down(&pstr->oss.setup_mutex);
2332                 memset(&template, 0, sizeof(template));
2333                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2334                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2335                         snd_pcm_oss_proc_free_setup_list(pstr);
2336                         up(&pstr->oss.setup_mutex);
2337                         continue;
2338                 }
2339                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2340                         if (!strcmp(setup->task_name, task_name)) {
2341                                 template = *setup;
2342                                 break;
2343                         }
2344                 }
2345                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2346                 template.periods = simple_strtoul(str, NULL, 10);
2347                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2348                 template.period_size = simple_strtoul(str, NULL, 10);
2349                 for (idx1 = 31; idx1 >= 0; idx1--)
2350                         if (template.period_size & (1 << idx1))
2351                                 break;
2352                 for (idx1--; idx1 >= 0; idx1--)
2353                         template.period_size &= ~(1 << idx1);
2354                 do {
2355                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2356                         if (!strcmp(str, "disable")) {
2357                                 template.disable = 1;
2358                         } else if (!strcmp(str, "direct")) {
2359                                 template.direct = 1;
2360                         } else if (!strcmp(str, "block")) {
2361                                 template.block = 1;
2362                         } else if (!strcmp(str, "non-block")) {
2363                                 template.nonblock = 1;
2364                         } else if (!strcmp(str, "partial-frag")) {
2365                                 template.partialfrag = 1;
2366                         } else if (!strcmp(str, "no-silence")) {
2367                                 template.nosilence = 1;
2368                         } else if (!strcmp(str, "buggy-ptr")) {
2369                                 template.buggyptr = 1;
2370                         }
2371                 } while (*str);
2372                 if (setup == NULL) {
2373                         setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL);
2374                         if (setup) {
2375                                 if (pstr->oss.setup_list == NULL) {
2376                                         pstr->oss.setup_list = setup;
2377                                 } else {
2378                                         for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2379                                         setup1->next = setup;
2380                                 }
2381                                 template.task_name = kstrdup(task_name, GFP_KERNEL);
2382                         } else {
2383                                 buffer->error = -ENOMEM;
2384                         }
2385                 }
2386                 if (setup)
2387                         *setup = template;
2388                 up(&pstr->oss.setup_mutex);
2389         }
2390 }
2391
2392 static void snd_pcm_oss_proc_init(snd_pcm_t *pcm)
2393 {
2394         int stream;
2395         for (stream = 0; stream < 2; ++stream) {
2396                 snd_info_entry_t *entry;
2397                 snd_pcm_str_t *pstr = &pcm->streams[stream];
2398                 if (pstr->substream_count == 0)
2399                         continue;
2400                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2401                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2402                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2403                         entry->c.text.read_size = 8192;
2404                         entry->c.text.read = snd_pcm_oss_proc_read;
2405                         entry->c.text.write_size = 8192;
2406                         entry->c.text.write = snd_pcm_oss_proc_write;
2407                         entry->private_data = pstr;
2408                         if (snd_info_register(entry) < 0) {
2409                                 snd_info_free_entry(entry);
2410                                 entry = NULL;
2411                         }
2412                 }
2413                 pstr->oss.proc_entry = entry;
2414         }
2415 }
2416
2417 static void snd_pcm_oss_proc_done(snd_pcm_t *pcm)
2418 {
2419         int stream;
2420         for (stream = 0; stream < 2; ++stream) {
2421                 snd_pcm_str_t *pstr = &pcm->streams[stream];
2422                 if (pstr->oss.proc_entry) {
2423                         snd_info_unregister(pstr->oss.proc_entry);
2424                         pstr->oss.proc_entry = NULL;
2425                         snd_pcm_oss_proc_free_setup_list(pstr);
2426                 }
2427         }
2428 }
2429
2430 /*
2431  *  ENTRY functions
2432  */
2433
2434 static struct file_operations snd_pcm_oss_f_reg =
2435 {
2436         .owner =        THIS_MODULE,
2437         .read =         snd_pcm_oss_read,
2438         .write =        snd_pcm_oss_write,
2439         .open =         snd_pcm_oss_open,
2440         .release =      snd_pcm_oss_release,
2441         .poll =         snd_pcm_oss_poll,
2442         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2443         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2444         .mmap =         snd_pcm_oss_mmap,
2445 };
2446
2447 static snd_minor_t snd_pcm_oss_reg =
2448 {
2449         .comment =      "digital audio",
2450         .f_ops =        &snd_pcm_oss_f_reg,
2451 };
2452
2453 static void register_oss_dsp(snd_pcm_t *pcm, int index)
2454 {
2455         char name[128];
2456         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2457         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2458                                     pcm->card, index, &snd_pcm_oss_reg,
2459                                     name) < 0) {
2460                 snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device);
2461         }
2462 }
2463
2464 static int snd_pcm_oss_register_minor(snd_pcm_t * pcm)
2465 {
2466         pcm->oss.reg = 0;
2467         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2468                 char name[128];
2469                 int duplex;
2470                 register_oss_dsp(pcm, 0);
2471                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 
2472                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 
2473                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2474                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2475 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2476                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2477                                       pcm->card->number,
2478                                       name);
2479 #endif
2480                 pcm->oss.reg++;
2481                 pcm->oss.reg_mask |= 1;
2482         }
2483         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2484                 register_oss_dsp(pcm, 1);
2485                 pcm->oss.reg++;
2486                 pcm->oss.reg_mask |= 2;
2487         }
2488
2489         if (pcm->oss.reg)
2490                 snd_pcm_oss_proc_init(pcm);
2491
2492         return 0;
2493 }
2494
2495 static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm)
2496 {
2497         if (pcm->oss.reg) {
2498                 if (pcm->oss.reg_mask & 1) {
2499                         pcm->oss.reg_mask &= ~1;
2500                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2501                                                   pcm->card, 0);
2502                 }
2503                 if (pcm->oss.reg_mask & 2) {
2504                         pcm->oss.reg_mask &= ~2;
2505                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2506                                                   pcm->card, 1);
2507                 }
2508         }
2509         return 0;
2510 }
2511
2512 static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm)
2513 {
2514         snd_pcm_oss_disconnect_minor(pcm);
2515         if (pcm->oss.reg) {
2516                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2517 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2518                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2519 #endif
2520                 }
2521                 pcm->oss.reg = 0;
2522                 snd_pcm_oss_proc_done(pcm);
2523         }
2524         return 0;
2525 }
2526
2527 static snd_pcm_notify_t snd_pcm_oss_notify =
2528 {
2529         .n_register =   snd_pcm_oss_register_minor,
2530         .n_disconnect = snd_pcm_oss_disconnect_minor,
2531         .n_unregister = snd_pcm_oss_unregister_minor,
2532 };
2533
2534 static int __init alsa_pcm_oss_init(void)
2535 {
2536         int i;
2537         int err;
2538
2539         /* check device map table */
2540         for (i = 0; i < SNDRV_CARDS; i++) {
2541                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2542                         snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]);
2543                         dsp_map[i] = 0;
2544                 }
2545                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2546                         snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]);
2547                         adsp_map[i] = 1;
2548                 }
2549         }
2550         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2551                 return err;
2552         return 0;
2553 }
2554
2555 static void __exit alsa_pcm_oss_exit(void)
2556 {
2557         snd_pcm_notify(&snd_pcm_oss_notify, 1);
2558 }
2559
2560 module_init(alsa_pcm_oss_init)
2561 module_exit(alsa_pcm_oss_exit)