git.oblomov.eu Git - linux-2.6/blob - 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, (const char *)buf, runtime->oss.period_bytes, 0);
 854                         if (tmp <= 0)
 855                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 856                         runtime->oss.bytes += tmp;
 857                         buf += tmp;
 858                         bytes -= tmp;
 859                         xfer += tmp;
 860                         if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
 861                             tmp != runtime->oss.period_bytes)
 862                                 break;
 863                 }
 864         }
 865         return xfer;
 866 }
 867
 868 static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel)
 869 {
 870         snd_pcm_runtime_t *runtime = substream->runtime;
 871         snd_pcm_sframes_t frames, frames1;
 872         char __user *final_dst = (char __user *)buf;
 873         if (runtime->oss.plugin_first) {
 874                 snd_pcm_plugin_channel_t *channels;
 875                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
 876                 if (!in_kernel)
 877                         buf = runtime->oss.buffer;
 878                 frames = bytes / oss_frame_bytes;
 879                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
 880                 if (frames1 < 0)
 881                         return frames1;
 882                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
 883                 if (frames1 <= 0)
 884                         return frames1;
 885                 bytes = frames1 * oss_frame_bytes;
 886                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
 887                         return -EFAULT;
 888         } else {
 889                 frames = bytes_to_frames(runtime, bytes);
 890                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
 891                 if (frames1 <= 0)
 892                         return frames1;
 893                 bytes = frames_to_bytes(runtime, frames1);
 894         }
 895         return bytes;
 896 }
 897
 898 static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes)
 899 {
 900         size_t xfer = 0;
 901         ssize_t tmp;
 902         snd_pcm_runtime_t *runtime = substream->runtime;
 903
 904         if (atomic_read(&runtime->mmap_count))
 905                 return -ENXIO;
 906
 907         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 908                 return tmp;
 909         while (bytes > 0) {
 910                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 911                         if (runtime->oss.buffer_used == 0) {
 912                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
 913                                 if (tmp <= 0)
 914                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 915                                 runtime->oss.bytes += tmp;
 916                                 runtime->oss.period_ptr = tmp;
 917                                 runtime->oss.buffer_used = tmp;
 918                         }
 919                         tmp = bytes;
 920                         if ((size_t) tmp > runtime->oss.buffer_used)
 921                                 tmp = runtime->oss.buffer_used;
 922                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
 923                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 924                         buf += tmp;
 925                         bytes -= tmp;
 926                         xfer += tmp;
 927                         runtime->oss.buffer_used -= tmp;
 928                 } else {
 929                         tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0);
 930                         if (tmp <= 0)
 931                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 932                         runtime->oss.bytes += tmp;
 933                         buf += tmp;
 934                         bytes -= tmp;
 935                         xfer += tmp;
 936                 }
 937         }
 938         return xfer;
 939 }
 940
 941 static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file)
 942 {
 943         snd_pcm_substream_t *substream;
 944
 945         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 946         if (substream != NULL) {
 947                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 948                 substream->runtime->oss.prepare = 1;
 949         }
 950         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
 951         if (substream != NULL) {
 952                 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 953                 substream->runtime->oss.prepare = 1;
 954         }
 955         return 0;
 956 }
 957
 958 static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file)
 959 {
 960         snd_pcm_substream_t *substream;
 961         int err;
 962
 963         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 964         if (substream != NULL) {
 965                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
 966                         return err;
 967                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
 968         }
 969         /* note: all errors from the start action are ignored */
 970         /* OSS apps do not know, how to handle them */
 971         return 0;
 972 }
 973
 974 static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size)
 975 {
 976         snd_pcm_runtime_t *runtime;
 977         ssize_t result = 0;
 978         long res;
 979         wait_queue_t wait;
 980
 981         runtime = substream->runtime;
 982         init_waitqueue_entry(&wait, current);
 983         add_wait_queue(&runtime->sleep, &wait);
 984 #ifdef OSS_DEBUG
 985         printk("sync1: size = %li\n", size);
 986 #endif
 987         while (1) {
 988                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
 989                 if (result > 0) {
 990                         runtime->oss.buffer_used = 0;
 991                         result = 0;
 992                         break;
 993                 }
 994                 if (result != 0 && result != -EAGAIN)
 995                         break;
 996                 result = 0;
 997                 set_current_state(TASK_INTERRUPTIBLE);
 998                 snd_pcm_stream_lock_irq(substream);
 999                 res = runtime->status->state;
1000                 snd_pcm_stream_unlock_irq(substream);
1001                 if (res != SNDRV_PCM_STATE_RUNNING) {
1002                         set_current_state(TASK_RUNNING);
1003                         break;
1004                 }
1005                 res = schedule_timeout(10 * HZ);
1006                 if (signal_pending(current)) {
1007                         result = -ERESTARTSYS;
1008                         break;
1009                 }
1010                 if (res == 0) {
1011                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1012                         result = -EIO;
1013                         break;
1014                 }
1015         }
1016         remove_wait_queue(&runtime->sleep, &wait);
1017         return result;
1018 }
1019
1020 static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file)
1021 {
1022         int err = 0;
1023         unsigned int saved_f_flags;
1024         snd_pcm_substream_t *substream;
1025         snd_pcm_runtime_t *runtime;
1026         snd_pcm_format_t format;
1027         unsigned long width;
1028         size_t size;
1029
1030         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1031         if (substream != NULL) {
1032                 runtime = substream->runtime;
1033                 if (atomic_read(&runtime->mmap_count))
1034                         goto __direct;
1035                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1036                         return err;
1037                 format = snd_pcm_oss_format_from(runtime->oss.format);
1038                 width = snd_pcm_format_physical_width(format);
1039                 if (runtime->oss.buffer_used > 0) {
1040 #ifdef OSS_DEBUG
1041                         printk("sync: buffer_used\n");
1042 #endif
1043                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1044                         snd_pcm_format_set_silence(format,
1045                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1046                                                    size);
1047                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1048                         if (err < 0)
1049                                 return err;
1050                 } else if (runtime->oss.period_ptr > 0) {
1051 #ifdef OSS_DEBUG
1052                         printk("sync: period_ptr\n");
1053 #endif
1054                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1055                         snd_pcm_format_set_silence(format,
1056                                                    runtime->oss.buffer,
1057                                                    size * 8 / width);
1058                         err = snd_pcm_oss_sync1(substream, size);
1059                         if (err < 0)
1060                                 return err;
1061                 }
1062                 /*
1063                  * The ALSA's period might be a bit large than OSS one.
1064                  * Fill the remain portion of ALSA period with zeros.
1065                  */
1066                 size = runtime->control->appl_ptr % runtime->period_size;
1067                 if (size > 0) {
1068                         size = runtime->period_size - size;
1069                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1070                                 size = (runtime->frame_bits * size) / 8;
1071                                 while (size > 0) {
1072                                         mm_segment_t fs;
1073                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1074                                         size -= size1;
1075                                         size1 *= 8;
1076                                         size1 /= runtime->sample_bits;
1077                                         snd_pcm_format_set_silence(runtime->format,
1078                                                                    runtime->oss.buffer,
1079                                                                    size1);
1080                                         fs = snd_enter_user();
1081                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1082                                         snd_leave_user(fs);
1083                                 }
1084                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1085                                 void __user *buffers[runtime->channels];
1086                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1087                                 snd_pcm_lib_writev(substream, buffers, size);
1088                         }
1089                 }
1090                 /*
1091                  * finish sync: drain the buffer
1092                  */
1093               __direct:
1094                 saved_f_flags = substream->ffile->f_flags;
1095                 substream->ffile->f_flags &= ~O_NONBLOCK;
1096                 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1097                 substream->ffile->f_flags = saved_f_flags;
1098                 if (err < 0)
1099                         return err;
1100                 runtime->oss.prepare = 1;
1101         }
1102
1103         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1104         if (substream != NULL) {
1105                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1106                         return err;
1107                 runtime = substream->runtime;
1108                 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1109                 if (err < 0)
1110                         return err;
1111                 runtime->oss.buffer_used = 0;
1112                 runtime->oss.prepare = 1;
1113         }
1114         return 0;
1115 }
1116
1117 static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate)
1118 {
1119         int idx;
1120
1121         for (idx = 1; idx >= 0; --idx) {
1122                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1123                 snd_pcm_runtime_t *runtime;
1124                 if (substream == NULL)
1125                         continue;
1126                 runtime = substream->runtime;
1127                 if (rate < 1000)
1128                         rate = 1000;
1129                 else if (rate > 192000)
1130                         rate = 192000;
1131                 if (runtime->oss.rate != rate) {
1132                         runtime->oss.params = 1;
1133                         runtime->oss.rate = rate;
1134                 }
1135         }
1136         return snd_pcm_oss_get_rate(pcm_oss_file);
1137 }
1138
1139 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file)
1140 {
1141         snd_pcm_substream_t *substream;
1142         int err;
1143
1144         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1145                 return err;
1146         return substream->runtime->oss.rate;
1147 }
1148
1149 static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels)
1150 {
1151         int idx;
1152         if (channels < 1)
1153                 channels = 1;
1154         if (channels > 128)
1155                 return -EINVAL;
1156         for (idx = 1; idx >= 0; --idx) {
1157                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1158                 snd_pcm_runtime_t *runtime;
1159                 if (substream == NULL)
1160                         continue;
1161                 runtime = substream->runtime;
1162                 if (runtime->oss.channels != channels) {
1163                         runtime->oss.params = 1;
1164                         runtime->oss.channels = channels;
1165                 }
1166         }
1167         return snd_pcm_oss_get_channels(pcm_oss_file);
1168 }
1169
1170 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file)
1171 {
1172         snd_pcm_substream_t *substream;
1173         int err;
1174
1175         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1176                 return err;
1177         return substream->runtime->oss.channels;
1178 }
1179
1180 static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file)
1181 {
1182         snd_pcm_substream_t *substream;
1183         int err;
1184
1185         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1186                 return err;
1187         return substream->runtime->oss.period_bytes;
1188 }
1189
1190 static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file)
1191 {
1192         snd_pcm_substream_t *substream;
1193         int err;
1194         int direct;
1195         snd_pcm_hw_params_t *params;
1196         unsigned int formats = 0;
1197         snd_mask_t format_mask;
1198         int fmt;
1199
1200         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1201                 return err;
1202         if (atomic_read(&substream->runtime->mmap_count)) {
1203                 direct = 1;
1204         } else {
1205                 snd_pcm_oss_setup_t *setup = substream->oss.setup;
1206                 direct = (setup != NULL && setup->direct);
1207         }
1208         if (!direct)
1209                 return AFMT_MU_LAW | AFMT_U8 |
1210                        AFMT_S16_LE | AFMT_S16_BE |
1211                        AFMT_S8 | AFMT_U16_LE |
1212                        AFMT_U16_BE;
1213         params = kmalloc(sizeof(*params), GFP_KERNEL);
1214         if (!params)
1215                 return -ENOMEM;
1216         _snd_pcm_hw_params_any(params);
1217         err = snd_pcm_hw_refine(substream, params);
1218         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1219         kfree(params);
1220         snd_assert(err >= 0, return err);
1221         for (fmt = 0; fmt < 32; ++fmt) {
1222                 if (snd_mask_test(&format_mask, fmt)) {
1223                         int f = snd_pcm_oss_format_to(fmt);
1224                         if (f >= 0)
1225                                 formats |= f;
1226                 }
1227         }
1228         return formats;
1229 }
1230
1231 static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format)
1232 {
1233         int formats, idx;
1234
1235         if (format != AFMT_QUERY) {
1236                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1237                 if (!(formats & format))
1238                         format = AFMT_U8;
1239                 for (idx = 1; idx >= 0; --idx) {
1240                         snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1241                         snd_pcm_runtime_t *runtime;
1242                         if (substream == NULL)
1243                                 continue;
1244                         runtime = substream->runtime;
1245                         if (runtime->oss.format != format) {
1246                                 runtime->oss.params = 1;
1247                                 runtime->oss.format = format;
1248                         }
1249                 }
1250         }
1251         return snd_pcm_oss_get_format(pcm_oss_file);
1252 }
1253
1254 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file)
1255 {
1256         snd_pcm_substream_t *substream;
1257         int err;
1258
1259         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1260                 return err;
1261         return substream->runtime->oss.format;
1262 }
1263
1264 static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide)
1265 {
1266         snd_pcm_runtime_t *runtime;
1267
1268         if (substream == NULL)
1269                 return 0;
1270         runtime = substream->runtime;
1271         if (subdivide == 0) {
1272                 subdivide = runtime->oss.subdivision;
1273                 if (subdivide == 0)
1274                         subdivide = 1;
1275                 return subdivide;
1276         }
1277         if (runtime->oss.subdivision || runtime->oss.fragshift)
1278                 return -EINVAL;
1279         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1280             subdivide != 8 && subdivide != 16)
1281                 return -EINVAL;
1282         runtime->oss.subdivision = subdivide;
1283         runtime->oss.params = 1;
1284         return subdivide;
1285 }
1286
1287 static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide)
1288 {
1289         int err = -EINVAL, idx;
1290
1291         for (idx = 1; idx >= 0; --idx) {
1292                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1293                 if (substream == NULL)
1294                         continue;
1295                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1296                         return err;
1297         }
1298         return err;
1299 }
1300
1301 static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val)
1302 {
1303         snd_pcm_runtime_t *runtime;
1304
1305         if (substream == NULL)
1306                 return 0;
1307         runtime = substream->runtime;
1308         if (runtime->oss.subdivision || runtime->oss.fragshift)
1309                 return -EINVAL;
1310         runtime->oss.fragshift = val & 0xffff;
1311         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1312         if (runtime->oss.fragshift < 4)         /* < 16 */
1313                 runtime->oss.fragshift = 4;
1314         if (runtime->oss.maxfrags < 2)
1315                 runtime->oss.maxfrags = 2;
1316         runtime->oss.params = 1;
1317         return 0;
1318 }
1319
1320 static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val)
1321 {
1322         int err = -EINVAL, idx;
1323
1324         for (idx = 1; idx >= 0; --idx) {
1325                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1326                 if (substream == NULL)
1327                         continue;
1328                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1329                         return err;
1330         }
1331         return err;
1332 }
1333
1334 static int snd_pcm_oss_nonblock(struct file * file)
1335 {
1336         file->f_flags |= O_NONBLOCK;
1337         return 0;
1338 }
1339
1340 static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res)
1341 {
1342
1343         if (substream == NULL) {
1344                 res &= ~DSP_CAP_DUPLEX;
1345                 return res;
1346         }
1347 #ifdef DSP_CAP_MULTI
1348         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1349                 if (substream->pstr->substream_count > 1)
1350                         res |= DSP_CAP_MULTI;
1351 #endif
1352         /* DSP_CAP_REALTIME is set all times: */
1353         /* all ALSA drivers can return actual pointer in ring buffer */
1354 #if defined(DSP_CAP_REALTIME) && 0
1355         {
1356                 snd_pcm_runtime_t *runtime = substream->runtime;
1357                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1358                         res &= ~DSP_CAP_REALTIME;
1359         }
1360 #endif
1361         return res;
1362 }
1363
1364 static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file)
1365 {
1366         int result, idx;
1367
1368         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1369         for (idx = 0; idx < 2; idx++) {
1370                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1371                 result = snd_pcm_oss_get_caps1(substream, result);
1372         }
1373         result |= 0x0001;       /* revision - same as SB AWE 64 */
1374         return result;
1375 }
1376
1377 static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr)
1378 {
1379         snd_pcm_runtime_t *runtime = substream->runtime;
1380         snd_pcm_uframes_t appl_ptr;
1381         appl_ptr = hw_ptr + runtime->buffer_size;
1382         appl_ptr %= runtime->boundary;
1383         runtime->control->appl_ptr = appl_ptr;
1384 }
1385
1386 static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger)
1387 {
1388         snd_pcm_runtime_t *runtime;
1389         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1390         int err, cmd;
1391
1392 #ifdef OSS_DEBUG
1393         printk("pcm_oss: trigger = 0x%x\n", trigger);
1394 #endif
1395
1396         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1397         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1398
1399         if (psubstream) {
1400                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1401                         return err;
1402         }
1403         if (csubstream) {
1404                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1405                         return err;
1406         }
1407         if (psubstream) {
1408                 runtime = psubstream->runtime;
1409                 if (trigger & PCM_ENABLE_OUTPUT) {
1410                         if (runtime->oss.trigger)
1411                                 goto _skip1;
1412                         if (atomic_read(&psubstream->runtime->mmap_count))
1413                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1414                         runtime->oss.trigger = 1;
1415                         runtime->start_threshold = 1;
1416                         cmd = SNDRV_PCM_IOCTL_START;
1417                 } else {
1418                         if (!runtime->oss.trigger)
1419                                 goto _skip1;
1420                         runtime->oss.trigger = 0;
1421                         runtime->start_threshold = runtime->boundary;
1422                         cmd = SNDRV_PCM_IOCTL_DROP;
1423                         runtime->oss.prepare = 1;
1424                 }
1425                 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1426                 if (err < 0)
1427                         return err;
1428         }
1429  _skip1:
1430         if (csubstream) {
1431                 runtime = csubstream->runtime;
1432                 if (trigger & PCM_ENABLE_INPUT) {
1433                         if (runtime->oss.trigger)
1434                                 goto _skip2;
1435                         runtime->oss.trigger = 1;
1436                         runtime->start_threshold = 1;
1437                         cmd = SNDRV_PCM_IOCTL_START;
1438                 } else {
1439                         if (!runtime->oss.trigger)
1440                                 goto _skip2;
1441                         runtime->oss.trigger = 0;
1442                         runtime->start_threshold = runtime->boundary;
1443                         cmd = SNDRV_PCM_IOCTL_DROP;
1444                         runtime->oss.prepare = 1;
1445                 }
1446                 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1447                 if (err < 0)
1448                         return err;
1449         }
1450  _skip2:
1451         return 0;
1452 }
1453
1454 static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file)
1455 {
1456         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1457         int result = 0;
1458
1459         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1460         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1461         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1462                 result |= PCM_ENABLE_OUTPUT;
1463         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1464                 result |= PCM_ENABLE_INPUT;
1465         return result;
1466 }
1467
1468 static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file)
1469 {
1470         snd_pcm_substream_t *substream;
1471         snd_pcm_runtime_t *runtime;
1472         snd_pcm_sframes_t delay;
1473         int err;
1474
1475         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1476         if (substream == NULL)
1477                 return -EINVAL;
1478         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1479                 return err;
1480         runtime = substream->runtime;
1481         if (runtime->oss.params || runtime->oss.prepare)
1482                 return 0;
1483         err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1484         if (err == -EPIPE)
1485                 delay = 0;      /* hack for broken OSS applications */
1486         else if (err < 0)
1487                 return err;
1488         return snd_pcm_oss_bytes(substream, delay);
1489 }
1490
1491 static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info)
1492 {
1493         snd_pcm_substream_t *substream;
1494         snd_pcm_runtime_t *runtime;
1495         snd_pcm_sframes_t delay;
1496         int fixup;
1497         struct count_info info;
1498         int err;
1499
1500         if (_info == NULL)
1501                 return -EFAULT;
1502         substream = pcm_oss_file->streams[stream];
1503         if (substream == NULL)
1504                 return -EINVAL;
1505         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1506                 return err;
1507         runtime = substream->runtime;
1508         if (runtime->oss.params || runtime->oss.prepare) {
1509                 memset(&info, 0, sizeof(info));
1510                 if (copy_to_user(_info, &info, sizeof(info)))
1511                         return -EFAULT;
1512                 return 0;
1513         }
1514         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1515                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1516                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1517                         err = 0;
1518                         delay = 0;
1519                         fixup = 0;
1520                 } else {
1521                         fixup = runtime->oss.buffer_used;
1522                 }
1523         } else {
1524                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1525                 fixup = -runtime->oss.buffer_used;
1526         }
1527         if (err < 0)
1528                 return err;
1529         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1530         if (atomic_read(&runtime->mmap_count)) {
1531                 snd_pcm_sframes_t n;
1532                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1533                 if (n < 0)
1534                         n += runtime->boundary;
1535                 info.blocks = n / runtime->period_size;
1536                 runtime->oss.prev_hw_ptr_interrupt = delay;
1537                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1538                         snd_pcm_oss_simulate_fill(substream, delay);
1539                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1540         } else {
1541                 delay = snd_pcm_oss_bytes(substream, delay);
1542                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1543                         info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1544                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1545                 } else {
1546                         delay += fixup;
1547                         info.blocks = delay / runtime->oss.period_bytes;
1548                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1549                 }
1550         }
1551         if (copy_to_user(_info, &info, sizeof(info)))
1552                 return -EFAULT;
1553         return 0;
1554 }
1555
1556 static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1557 {
1558         snd_pcm_substream_t *substream;
1559         snd_pcm_runtime_t *runtime;
1560         snd_pcm_sframes_t avail;
1561         int fixup;
1562         struct audio_buf_info info;
1563         int err;
1564
1565         if (_info == NULL)
1566                 return -EFAULT;
1567         substream = pcm_oss_file->streams[stream];
1568         if (substream == NULL)
1569                 return -EINVAL;
1570         runtime = substream->runtime;
1571
1572         if (runtime->oss.params &&
1573             (err = snd_pcm_oss_change_params(substream)) < 0)
1574                 return err;
1575
1576         info.fragsize = runtime->oss.period_bytes;
1577         info.fragstotal = runtime->periods;
1578         if (runtime->oss.prepare) {
1579                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1580                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1581                         info.fragments = runtime->oss.periods;
1582                 } else {
1583                         info.bytes = 0;
1584                         info.fragments = 0;
1585                 }
1586         } else {
1587                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1588                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1589                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1590                                 avail = runtime->buffer_size;
1591                                 err = 0;
1592                                 fixup = 0;
1593                         } else {
1594                                 avail = runtime->buffer_size - avail;
1595                                 fixup = -runtime->oss.buffer_used;
1596                         }
1597                 } else {
1598                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1599                         fixup = runtime->oss.buffer_used;
1600                 }
1601                 if (err < 0)
1602                         return err;
1603                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1604                 info.fragments = info.bytes / runtime->oss.period_bytes;
1605         }
1606
1607 #ifdef OSS_DEBUG
1608         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1609 #endif
1610         if (copy_to_user(_info, &info, sizeof(info)))
1611                 return -EFAULT;
1612         return 0;
1613 }
1614
1615 static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1616 {
1617         // it won't be probably implemented
1618         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1619         return -EINVAL;
1620 }
1621
1622 static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name)
1623 {
1624         const char *ptr, *ptrl;
1625         snd_pcm_oss_setup_t *setup;
1626
1627         down(&pcm->streams[stream].oss.setup_mutex);
1628         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1629                 if (!strcmp(setup->task_name, task_name)) {
1630                         up(&pcm->streams[stream].oss.setup_mutex);
1631                         return setup;
1632                 }
1633         }
1634         ptr = ptrl = task_name;
1635         while (*ptr) {
1636                 if (*ptr == '/')
1637                         ptrl = ptr + 1;
1638                 ptr++;
1639         }
1640         if (ptrl == task_name) {
1641                 goto __not_found;
1642                 return NULL;
1643         }
1644         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1645                 if (!strcmp(setup->task_name, ptrl)) {
1646                         up(&pcm->streams[stream].oss.setup_mutex);
1647                         return setup;
1648                 }
1649         }
1650       __not_found:
1651         up(&pcm->streams[stream].oss.setup_mutex);
1652         return NULL;
1653 }
1654
1655 static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream,
1656                                        snd_pcm_oss_setup_t *setup,
1657                                        int minor)
1658 {
1659         snd_pcm_runtime_t *runtime;
1660
1661         substream->oss.oss = 1;
1662         substream->oss.setup = setup;
1663         runtime = substream->runtime;
1664         runtime->oss.params = 1;
1665         runtime->oss.trigger = 1;
1666         runtime->oss.rate = 8000;
1667         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1668         case SNDRV_MINOR_OSS_PCM_8:
1669                 runtime->oss.format = AFMT_U8;
1670                 break;
1671         case SNDRV_MINOR_OSS_PCM_16:
1672                 runtime->oss.format = AFMT_S16_LE;
1673                 break;
1674         default:
1675                 runtime->oss.format = AFMT_MU_LAW;
1676         }
1677         runtime->oss.channels = 1;
1678         runtime->oss.fragshift = 0;
1679         runtime->oss.maxfrags = 0;
1680         runtime->oss.subdivision = 0;
1681 }
1682
1683 static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream)
1684 {
1685         snd_pcm_runtime_t *runtime;
1686         runtime = substream->runtime;
1687         vfree(runtime->oss.buffer);
1688         snd_pcm_oss_plugin_clear(substream);
1689         substream->oss.file = NULL;
1690         substream->oss.oss = 0;
1691 }
1692
1693 static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file)
1694 {
1695         int cidx;
1696         snd_assert(pcm_oss_file != NULL, return -ENXIO);
1697         for (cidx = 0; cidx < 2; ++cidx) {
1698                 snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx];
1699                 snd_pcm_runtime_t *runtime;
1700                 if (substream == NULL)
1701                         continue;
1702                 runtime = substream->runtime;
1703
1704                 snd_pcm_stream_lock_irq(substream);
1705                 if (snd_pcm_running(substream))
1706                         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1707                 snd_pcm_stream_unlock_irq(substream);
1708                 if (substream->ffile != NULL) {
1709                         if (substream->ops->hw_free != NULL)
1710                                 substream->ops->hw_free(substream);
1711                         substream->ops->close(substream);
1712                         substream->ffile = NULL;
1713                 }
1714                 snd_pcm_oss_release_substream(substream);
1715                 snd_pcm_release_substream(substream);
1716         }
1717         kfree(pcm_oss_file);
1718         return 0;
1719 }
1720
1721 static int snd_pcm_oss_open_file(struct file *file,
1722                                  snd_pcm_t *pcm,
1723                                  snd_pcm_oss_file_t **rpcm_oss_file,
1724                                  int minor,
1725                                  snd_pcm_oss_setup_t *psetup,
1726                                  snd_pcm_oss_setup_t *csetup)
1727 {
1728         int err = 0;
1729         snd_pcm_oss_file_t *pcm_oss_file;
1730         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1731         unsigned int f_mode = file->f_mode;
1732
1733         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1734         *rpcm_oss_file = NULL;
1735
1736         pcm_oss_file = kcalloc(1, sizeof(*pcm_oss_file), GFP_KERNEL);
1737         if (pcm_oss_file == NULL)
1738                 return -ENOMEM;
1739
1740         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1741             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1742                 f_mode = FMODE_WRITE;
1743         if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1744                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1745                                                &psubstream)) < 0) {
1746                         snd_pcm_oss_release_file(pcm_oss_file);
1747                         return err;
1748                 }
1749                 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1750         }
1751         if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1752                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
1753                                                &csubstream)) < 0) {
1754                         if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1755                                 snd_pcm_oss_release_file(pcm_oss_file);
1756                                 return err;
1757                         } else {
1758                                 csubstream = NULL;
1759                         }
1760                 }
1761                 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1762         }
1763
1764         if (psubstream == NULL && csubstream == NULL) {
1765                 snd_pcm_oss_release_file(pcm_oss_file);
1766                 return -EINVAL;
1767         }
1768         if (psubstream != NULL) {
1769                 psubstream->oss.file = pcm_oss_file;
1770                 err = snd_pcm_hw_constraints_init(psubstream);
1771                 if (err < 0) {
1772                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1773                         snd_pcm_oss_release_file(pcm_oss_file);
1774                         return err;
1775                 }
1776                 if ((err = psubstream->ops->open(psubstream)) < 0) {
1777                         snd_pcm_oss_release_file(pcm_oss_file);
1778                         return err;
1779                 }
1780                 psubstream->ffile = file;
1781                 err = snd_pcm_hw_constraints_complete(psubstream);
1782                 if (err < 0) {
1783                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1784                         snd_pcm_oss_release_file(pcm_oss_file);
1785                         return err;
1786                 }
1787                 snd_pcm_oss_init_substream(psubstream, psetup, minor);
1788         }
1789         if (csubstream != NULL) {
1790                 csubstream->oss.file = pcm_oss_file;
1791                 err = snd_pcm_hw_constraints_init(csubstream);
1792                 if (err < 0) {
1793                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1794                         snd_pcm_oss_release_file(pcm_oss_file);
1795                         return err;
1796                 }
1797                 if ((err = csubstream->ops->open(csubstream)) < 0) {
1798                         snd_pcm_oss_release_file(pcm_oss_file);
1799                         return err;
1800                 }
1801                 csubstream->ffile = file;
1802                 err = snd_pcm_hw_constraints_complete(csubstream);
1803                 if (err < 0) {
1804                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1805                         snd_pcm_oss_release_file(pcm_oss_file);
1806                         return err;
1807                 }
1808                 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1809         }
1810
1811         file->private_data = pcm_oss_file;
1812         *rpcm_oss_file = pcm_oss_file;
1813         return 0;
1814 }
1815
1816
1817 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1818 {
1819         int minor = iminor(inode);
1820         int cardnum = SNDRV_MINOR_OSS_CARD(minor);
1821         int device;
1822         int err;
1823         char task_name[32];
1824         snd_pcm_t *pcm;
1825         snd_pcm_oss_file_t *pcm_oss_file;
1826         snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL;
1827         int nonblock;
1828         wait_queue_t wait;
1829
1830         snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
1831         device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ?
1832                 adsp_map[cardnum] : dsp_map[cardnum];
1833
1834         pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device];
1835         if (pcm == NULL) {
1836                 err = -ENODEV;
1837                 goto __error1;
1838         }
1839         err = snd_card_file_add(pcm->card, file);
1840         if (err < 0)
1841                 goto __error1;
1842         if (!try_module_get(pcm->card->module)) {
1843                 err = -EFAULT;
1844                 goto __error2;
1845         }
1846         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1847                 err = -EFAULT;
1848                 goto __error;
1849         }
1850         if (file->f_mode & FMODE_WRITE)
1851                 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1852         if (file->f_mode & FMODE_READ)
1853                 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1854
1855         nonblock = !!(file->f_flags & O_NONBLOCK);
1856         if (psetup && !psetup->disable) {
1857                 if (psetup->nonblock)
1858                         nonblock = 1;
1859                 else if (psetup->block)
1860                         nonblock = 0;
1861         } else if (csetup && !csetup->disable) {
1862                 if (csetup->nonblock)
1863                         nonblock = 1;
1864                 else if (csetup->block)
1865                         nonblock = 0;
1866         }
1867         if (!nonblock)
1868                 nonblock = nonblock_open;
1869
1870         init_waitqueue_entry(&wait, current);
1871         add_wait_queue(&pcm->open_wait, &wait);
1872         down(&pcm->open_mutex);
1873         while (1) {
1874                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1875                                             minor, psetup, csetup);
1876                 if (err >= 0)
1877                         break;
1878                 if (err == -EAGAIN) {
1879                         if (nonblock) {
1880                                 err = -EBUSY;
1881                                 break;
1882                         }
1883                 } else
1884                         break;
1885                 set_current_state(TASK_INTERRUPTIBLE);
1886                 up(&pcm->open_mutex);
1887                 schedule();
1888                 down(&pcm->open_mutex);
1889                 if (signal_pending(current)) {
1890                         err = -ERESTARTSYS;
1891                         break;
1892                 }
1893         }
1894         remove_wait_queue(&pcm->open_wait, &wait);
1895         up(&pcm->open_mutex);
1896         if (err < 0)
1897                 goto __error;
1898         return err;
1899
1900       __error:
1901         module_put(pcm->card->module);
1902       __error2:
1903         snd_card_file_remove(pcm->card, file);
1904       __error1:
1905         return err;
1906 }
1907
1908 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1909 {
1910         snd_pcm_t *pcm;
1911         snd_pcm_substream_t *substream;
1912         snd_pcm_oss_file_t *pcm_oss_file;
1913
1914         pcm_oss_file = file->private_data;
1915         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1916         if (substream == NULL)
1917                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1918         snd_assert(substream != NULL, return -ENXIO);
1919         pcm = substream->pcm;
1920         snd_pcm_oss_sync(pcm_oss_file);
1921         down(&pcm->open_mutex);
1922         snd_pcm_oss_release_file(pcm_oss_file);
1923         up(&pcm->open_mutex);
1924         wake_up(&pcm->open_wait);
1925         module_put(pcm->card->module);
1926         snd_card_file_remove(pcm->card, file);
1927         return 0;
1928 }
1929
1930 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1931 {
1932         snd_pcm_oss_file_t *pcm_oss_file;
1933         int __user *p = (int __user *)arg;
1934         int res;
1935
1936         pcm_oss_file = file->private_data;
1937         if (cmd == OSS_GETVERSION)
1938                 return put_user(SNDRV_OSS_VERSION, p);
1939         if (cmd == OSS_ALSAEMULVER)
1940                 return put_user(1, p);
1941 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1942         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
1943                 snd_pcm_substream_t *substream;
1944                 int idx;
1945                 for (idx = 0; idx < 2; ++idx) {
1946                         substream = pcm_oss_file->streams[idx];
1947                         if (substream != NULL)
1948                                 break;
1949                 }
1950                 snd_assert(substream != NULL, return -ENXIO);
1951                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1952         }
1953 #endif
1954         if (((cmd >> 8) & 0xff) != 'P')
1955                 return -EINVAL;
1956 #ifdef OSS_DEBUG
1957         printk("pcm_oss: ioctl = 0x%x\n", cmd);
1958 #endif
1959         switch (cmd) {
1960         case SNDCTL_DSP_RESET:
1961                 return snd_pcm_oss_reset(pcm_oss_file);
1962         case SNDCTL_DSP_SYNC:
1963                 return snd_pcm_oss_sync(pcm_oss_file);
1964         case SNDCTL_DSP_SPEED:
1965                 if (get_user(res, p))
1966                         return -EFAULT;
1967                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1968                         return res;
1969                 return put_user(res, p);
1970         case SOUND_PCM_READ_RATE:
1971                 res = snd_pcm_oss_get_rate(pcm_oss_file);
1972                 if (res < 0)
1973                         return res;
1974                 return put_user(res, p);
1975         case SNDCTL_DSP_STEREO:
1976                 if (get_user(res, p))
1977                         return -EFAULT;
1978                 res = res > 0 ? 2 : 1;
1979                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1980                         return res;
1981                 return put_user(--res, p);
1982         case SNDCTL_DSP_GETBLKSIZE:
1983                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1984                 if (res < 0)
1985                         return res;
1986                 return put_user(res, p);
1987         case SNDCTL_DSP_SETFMT:
1988                 if (get_user(res, p))
1989                         return -EFAULT;
1990                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1991                 if (res < 0)
1992                         return res;
1993                 return put_user(res, p);
1994         case SOUND_PCM_READ_BITS:
1995                 res = snd_pcm_oss_get_format(pcm_oss_file);
1996                 if (res < 0)
1997                         return res;
1998                 return put_user(res, p);
1999         case SNDCTL_DSP_CHANNELS:
2000                 if (get_user(res, p))
2001                         return -EFAULT;
2002                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2003                 if (res < 0)
2004                         return res;
2005                 return put_user(res, p);
2006         case SOUND_PCM_READ_CHANNELS:
2007                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2008                 if (res < 0)
2009                         return res;
2010                 return put_user(res, p);
2011         case SOUND_PCM_WRITE_FILTER:
2012         case SOUND_PCM_READ_FILTER:
2013                 return -EIO;
2014         case SNDCTL_DSP_POST:
2015                 return snd_pcm_oss_post(pcm_oss_file);
2016         case SNDCTL_DSP_SUBDIVIDE:
2017                 if (get_user(res, p))
2018                         return -EFAULT;
2019                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2020                 if (res < 0)
2021                         return res;
2022                 return put_user(res, p);
2023         case SNDCTL_DSP_SETFRAGMENT:
2024                 if (get_user(res, p))
2025                         return -EFAULT;
2026                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2027         case SNDCTL_DSP_GETFMTS:
2028                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2029                 if (res < 0)
2030                         return res;
2031                 return put_user(res, p);
2032         case SNDCTL_DSP_GETOSPACE:
2033         case SNDCTL_DSP_GETISPACE:
2034                 return snd_pcm_oss_get_space(pcm_oss_file,
2035                         cmd == SNDCTL_DSP_GETISPACE ?
2036                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2037                         (struct audio_buf_info __user *) arg);
2038         case SNDCTL_DSP_NONBLOCK:
2039                 return snd_pcm_oss_nonblock(file);
2040         case SNDCTL_DSP_GETCAPS:
2041                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2042                 if (res < 0)
2043                         return res;
2044                 return put_user(res, p);
2045         case SNDCTL_DSP_GETTRIGGER:
2046                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2047                 if (res < 0)
2048                         return res;
2049                 return put_user(res, p);
2050         case SNDCTL_DSP_SETTRIGGER:
2051                 if (get_user(res, p))
2052                         return -EFAULT;
2053                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2054         case SNDCTL_DSP_GETIPTR:
2055         case SNDCTL_DSP_GETOPTR:
2056                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2057                         cmd == SNDCTL_DSP_GETIPTR ?
2058                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2059                         (struct count_info __user *) arg);
2060         case SNDCTL_DSP_MAPINBUF:
2061         case SNDCTL_DSP_MAPOUTBUF:
2062                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2063                         cmd == SNDCTL_DSP_MAPINBUF ?
2064                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2065                         (struct buffmem_desc __user *) arg);
2066         case SNDCTL_DSP_SETSYNCRO:
2067                 /* stop DMA now.. */
2068                 return 0;
2069         case SNDCTL_DSP_SETDUPLEX:
2070                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2071                         return 0;
2072                 return -EIO;
2073         case SNDCTL_DSP_GETODELAY:
2074                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2075                 if (res < 0) {
2076                         /* it's for sure, some broken apps don't check for error codes */
2077                         put_user(0, p);
2078                         return res;
2079                 }
2080                 return put_user(res, p);
2081         case SNDCTL_DSP_PROFILE:
2082                 return 0;       /* silently ignore */
2083         default:
2084                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2085         }
2086         return -EINVAL;
2087 }
2088
2089 #ifdef CONFIG_COMPAT
2090 /* all compatible */
2091 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2092 #else
2093 #define snd_pcm_oss_ioctl_compat        NULL
2094 #endif
2095
2096 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2097 {
2098         snd_pcm_oss_file_t *pcm_oss_file;
2099         snd_pcm_substream_t *substream;
2100
2101         pcm_oss_file = file->private_data;
2102         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2103         if (substream == NULL)
2104                 return -ENXIO;
2105 #ifndef OSS_DEBUG
2106         return snd_pcm_oss_read1(substream, buf, count);
2107 #else
2108         {
2109                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2110                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2111                 return res;
2112         }
2113 #endif
2114 }
2115
2116 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2117 {
2118         snd_pcm_oss_file_t *pcm_oss_file;
2119         snd_pcm_substream_t *substream;
2120         long result;
2121
2122         pcm_oss_file = file->private_data;
2123         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2124         if (substream == NULL)
2125                 return -ENXIO;
2126         up(&file->f_dentry->d_inode->i_sem);
2127         result = snd_pcm_oss_write1(substream, buf, count);
2128         down(&file->f_dentry->d_inode->i_sem);
2129 #ifdef OSS_DEBUG
2130         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2131 #endif
2132         return result;
2133 }
2134
2135 static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream)
2136 {
2137         snd_pcm_runtime_t *runtime = substream->runtime;
2138         if (atomic_read(&runtime->mmap_count))
2139                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2140         else
2141                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2142 }
2143
2144 static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream)
2145 {
2146         snd_pcm_runtime_t *runtime = substream->runtime;
2147         if (atomic_read(&runtime->mmap_count))
2148                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2149         else
2150                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2151 }
2152
2153 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2154 {
2155         snd_pcm_oss_file_t *pcm_oss_file;
2156         unsigned int mask;
2157         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
2158
2159         pcm_oss_file = file->private_data;
2160
2161         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2162         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2163
2164         mask = 0;
2165         if (psubstream != NULL) {
2166                 snd_pcm_runtime_t *runtime = psubstream->runtime;
2167                 poll_wait(file, &runtime->sleep, wait);
2168                 snd_pcm_stream_lock_irq(psubstream);
2169                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2170                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2171                      snd_pcm_oss_playback_ready(psubstream)))
2172                         mask |= POLLOUT | POLLWRNORM;
2173                 snd_pcm_stream_unlock_irq(psubstream);
2174         }
2175         if (csubstream != NULL) {
2176                 snd_pcm_runtime_t *runtime = csubstream->runtime;
2177                 enum sndrv_pcm_state ostate;
2178                 poll_wait(file, &runtime->sleep, wait);
2179                 snd_pcm_stream_lock_irq(csubstream);
2180                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2181                     snd_pcm_oss_capture_ready(csubstream))
2182                         mask |= POLLIN | POLLRDNORM;
2183                 snd_pcm_stream_unlock_irq(csubstream);
2184                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2185                         snd_pcm_oss_file_t ofile;
2186                         memset(&ofile, 0, sizeof(ofile));
2187                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2188                         runtime->oss.trigger = 0;
2189                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2190                 }
2191         }
2192
2193         return mask;
2194 }
2195
2196 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2197 {
2198         snd_pcm_oss_file_t *pcm_oss_file;
2199         snd_pcm_substream_t *substream = NULL;
2200         snd_pcm_runtime_t *runtime;
2201         int err;
2202
2203 #ifdef OSS_DEBUG
2204         printk("pcm_oss: mmap begin\n");
2205 #endif
2206         pcm_oss_file = file->private_data;
2207         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2208         case VM_READ | VM_WRITE:
2209                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2210                 if (substream)
2211                         break;
2212                 /* Fall through */
2213         case VM_READ:
2214                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2215                 break;
2216         case VM_WRITE:
2217                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2218                 break;
2219         default:
2220                 return -EINVAL;
2221         }
2222         /* set VM_READ access as well to fix memset() routines that do
2223            reads before writes (to improve performance) */
2224         area->vm_flags |= VM_READ;
2225         if (substream == NULL)
2226                 return -ENXIO;
2227         runtime = substream->runtime;
2228         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2229                 return -EIO;
2230         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2231                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2232         else
2233                 return -EIO;
2234
2235         if (runtime->oss.params) {
2236                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2237                         return err;
2238         }
2239         if (runtime->oss.plugin_first != NULL)
2240                 return -EIO;
2241
2242         if (area->vm_pgoff != 0)
2243                 return -EINVAL;
2244
2245         err = snd_pcm_mmap_data(substream, file, area);
2246         if (err < 0)
2247                 return err;
2248         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2249         runtime->silence_threshold = 0;
2250         runtime->silence_size = 0;
2251 #ifdef OSS_DEBUG
2252         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2253 #endif
2254         /* In mmap mode we never stop */
2255         runtime->stop_threshold = runtime->boundary;
2256
2257         return 0;
2258 }
2259
2260 /*
2261  *  /proc interface
2262  */
2263
2264 static void snd_pcm_oss_proc_read(snd_info_entry_t *entry,
2265                                   snd_info_buffer_t * buffer)
2266 {
2267         snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2268         snd_pcm_oss_setup_t *setup = pstr->oss.setup_list;
2269         down(&pstr->oss.setup_mutex);
2270         while (setup) {
2271                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2272                             setup->task_name,
2273                             setup->periods,
2274                             setup->period_size,
2275                             setup->disable ? " disable" : "",
2276                             setup->direct ? " direct" : "",
2277                             setup->block ? " block" : "",
2278                             setup->nonblock ? " non-block" : "",
2279                             setup->partialfrag ? " partial-frag" : "",
2280                             setup->nosilence ? " no-silence" : "");
2281                 setup = setup->next;
2282         }
2283         up(&pstr->oss.setup_mutex);
2284 }
2285
2286 static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr)
2287 {
2288         unsigned int idx;
2289         snd_pcm_substream_t *substream;
2290         snd_pcm_oss_setup_t *setup, *setupn;
2291
2292         for (idx = 0, substream = pstr->substream;
2293              idx < pstr->substream_count; idx++, substream = substream->next)
2294                 substream->oss.setup = NULL;
2295         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2296              setup; setup = setupn) {
2297                 setupn = setup->next;
2298                 kfree(setup->task_name);
2299                 kfree(setup);
2300         }
2301         pstr->oss.setup_list = NULL;
2302 }
2303
2304 static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
2305                                    snd_info_buffer_t * buffer)
2306 {
2307         snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2308         char line[128], str[32], task_name[32], *ptr;
2309         int idx1;
2310         snd_pcm_oss_setup_t *setup, *setup1, template;
2311
2312         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2313                 down(&pstr->oss.setup_mutex);
2314                 memset(&template, 0, sizeof(template));
2315                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2316                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2317                         snd_pcm_oss_proc_free_setup_list(pstr);
2318                         up(&pstr->oss.setup_mutex);
2319                         continue;
2320                 }
2321                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2322                         if (!strcmp(setup->task_name, task_name)) {
2323                                 template = *setup;
2324                                 break;
2325                         }
2326                 }
2327                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2328                 template.periods = simple_strtoul(str, NULL, 10);
2329                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2330                 template.period_size = simple_strtoul(str, NULL, 10);
2331                 for (idx1 = 31; idx1 >= 0; idx1--)
2332                         if (template.period_size & (1 << idx1))
2333                                 break;
2334                 for (idx1--; idx1 >= 0; idx1--)
2335                         template.period_size &= ~(1 << idx1);
2336                 do {
2337                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2338                         if (!strcmp(str, "disable")) {
2339                                 template.disable = 1;
2340                         } else if (!strcmp(str, "direct")) {
2341                                 template.direct = 1;
2342                         } else if (!strcmp(str, "block")) {
2343                                 template.block = 1;
2344                         } else if (!strcmp(str, "non-block")) {
2345                                 template.nonblock = 1;
2346                         } else if (!strcmp(str, "partial-frag")) {
2347                                 template.partialfrag = 1;
2348                         } else if (!strcmp(str, "no-silence")) {
2349                                 template.nosilence = 1;
2350                         }
2351                 } while (*str);
2352                 if (setup == NULL) {
2353                         setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL);
2354                         if (setup) {
2355                                 if (pstr->oss.setup_list == NULL) {
2356                                         pstr->oss.setup_list = setup;
2357                                 } else {
2358                                         for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2359                                         setup1->next = setup;
2360                                 }
2361                                 template.task_name = kstrdup(task_name, GFP_KERNEL);
2362                         } else {
2363                                 buffer->error = -ENOMEM;
2364                         }
2365                 }
2366                 if (setup)
2367                         *setup = template;
2368                 up(&pstr->oss.setup_mutex);
2369         }
2370 }
2371
2372 static void snd_pcm_oss_proc_init(snd_pcm_t *pcm)
2373 {
2374         int stream;
2375         for (stream = 0; stream < 2; ++stream) {
2376                 snd_info_entry_t *entry;
2377                 snd_pcm_str_t *pstr = &pcm->streams[stream];
2378                 if (pstr->substream_count == 0)
2379                         continue;
2380                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2381                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2382                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2383                         entry->c.text.read_size = 8192;
2384                         entry->c.text.read = snd_pcm_oss_proc_read;
2385                         entry->c.text.write_size = 8192;
2386                         entry->c.text.write = snd_pcm_oss_proc_write;
2387                         entry->private_data = pstr;
2388                         if (snd_info_register(entry) < 0) {
2389                                 snd_info_free_entry(entry);
2390                                 entry = NULL;
2391                         }
2392                 }
2393                 pstr->oss.proc_entry = entry;
2394         }
2395 }
2396
2397 static void snd_pcm_oss_proc_done(snd_pcm_t *pcm)
2398 {
2399         int stream;
2400         for (stream = 0; stream < 2; ++stream) {
2401                 snd_pcm_str_t *pstr = &pcm->streams[stream];
2402                 if (pstr->oss.proc_entry) {
2403                         snd_info_unregister(pstr->oss.proc_entry);
2404                         pstr->oss.proc_entry = NULL;
2405                         snd_pcm_oss_proc_free_setup_list(pstr);
2406                 }
2407         }
2408 }
2409
2410 /*
2411  *  ENTRY functions
2412  */
2413
2414 static struct file_operations snd_pcm_oss_f_reg =
2415 {
2416         .owner =        THIS_MODULE,
2417         .read =         snd_pcm_oss_read,
2418         .write =        snd_pcm_oss_write,
2419         .open =         snd_pcm_oss_open,
2420         .release =      snd_pcm_oss_release,
2421         .poll =         snd_pcm_oss_poll,
2422         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2423         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2424         .mmap =         snd_pcm_oss_mmap,
2425 };
2426
2427 static snd_minor_t snd_pcm_oss_reg =
2428 {
2429         .comment =      "digital audio",
2430         .f_ops =        &snd_pcm_oss_f_reg,
2431 };
2432
2433 static void register_oss_dsp(snd_pcm_t *pcm, int index)
2434 {
2435         char name[128];
2436         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2437         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2438                                     pcm->card, index, &snd_pcm_oss_reg,
2439                                     name) < 0) {
2440                 snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device);
2441         }
2442 }
2443
2444 static int snd_pcm_oss_register_minor(snd_pcm_t * pcm)
2445 {
2446         pcm->oss.reg = 0;
2447         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2448                 char name[128];
2449                 int duplex;
2450                 register_oss_dsp(pcm, 0);
2451                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2452                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2453                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2454                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2455 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2456                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2457                                       pcm->card->number,
2458                                       name);
2459 #endif
2460                 pcm->oss.reg++;
2461                 pcm->oss.reg_mask |= 1;
2462         }
2463         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2464                 register_oss_dsp(pcm, 1);
2465                 pcm->oss.reg++;
2466                 pcm->oss.reg_mask |= 2;
2467         }
2468
2469         if (pcm->oss.reg)
2470                 snd_pcm_oss_proc_init(pcm);
2471
2472         return 0;
2473 }
2474
2475 static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm)
2476 {
2477         if (pcm->oss.reg) {
2478                 if (pcm->oss.reg_mask & 1) {
2479                         pcm->oss.reg_mask &= ~1;
2480                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2481                                                   pcm->card, 0);
2482                 }
2483                 if (pcm->oss.reg_mask & 2) {
2484                         pcm->oss.reg_mask &= ~2;
2485                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2486                                                   pcm->card, 1);
2487                 }
2488         }
2489         return 0;
2490 }
2491
2492 static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm)
2493 {
2494         snd_pcm_oss_disconnect_minor(pcm);
2495         if (pcm->oss.reg) {
2496                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2497 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2498                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2499 #endif
2500                 }
2501                 pcm->oss.reg = 0;
2502                 snd_pcm_oss_proc_done(pcm);
2503         }
2504         return 0;
2505 }
2506
2507 static snd_pcm_notify_t snd_pcm_oss_notify =
2508 {
2509         .n_register =   snd_pcm_oss_register_minor,
2510         .n_disconnect = snd_pcm_oss_disconnect_minor,
2511         .n_unregister = snd_pcm_oss_unregister_minor,
2512 };
2513
2514 static int __init alsa_pcm_oss_init(void)
2515 {
2516         int i;
2517         int err;
2518
2519         /* check device map table */
2520         for (i = 0; i < SNDRV_CARDS; i++) {
2521                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2522                         snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]);
2523                         dsp_map[i] = 0;
2524                 }
2525                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2526                         snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]);
2527                         adsp_map[i] = 1;
2528                 }
2529         }
2530         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2531                 return err;
2532         return 0;
2533 }
2534
2535 static void __exit alsa_pcm_oss_exit(void)
2536 {
2537         snd_pcm_notify(&snd_pcm_oss_notify, 1);
2538 }
2539
2540 module_init(alsa_pcm_oss_init)
2541 module_exit(alsa_pcm_oss_exit)