sound/core/oss/pcm_oss.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer / OSS compatible
   3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #if 0
  23 #define PLUGIN_DEBUG
  24 #endif
  25 #if 0
  26 #define OSS_DEBUG
  27 #endif
  28
  29 #include <sound/driver.h>
  30 #include <linux/init.h>
  31 #include <linux/smp_lock.h>
  32 #include <linux/slab.h>
  33 #include <linux/time.h>
  34 #include <linux/vmalloc.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/string.h>
  37 #include <sound/core.h>
  38 #include <sound/minors.h>
  39 #include <sound/pcm.h>
  40 #include <sound/pcm_params.h>
  41 #include "pcm_plugin.h"
  42 #include <sound/info.h>
  43 #include <linux/soundcard.h>
  44 #include <sound/initval.h>
  45
  46 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  47
  48 static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
  49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  50 static int nonblock_open = 1;
  51
  52 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  54 MODULE_LICENSE("GPL");
  55 module_param_array(dsp_map, int, NULL, 0444);
  56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  57 module_param_array(adsp_map, int, NULL, 0444);
  58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  59 module_param(nonblock_open, bool, 0644);
  60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  63
  64 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
  65 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
  66 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
  67 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
  68
  69 static inline mm_segment_t snd_enter_user(void)
  70 {
  71         mm_segment_t fs = get_fs();
  72         set_fs(get_ds());
  73         return fs;
  74 }
  75
  76 static inline void snd_leave_user(mm_segment_t fs)
  77 {
  78         set_fs(fs);
  79 }
  80
  81 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
  82 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
  83 {
  84         struct snd_pcm_runtime *runtime = substream->runtime;
  85         struct snd_pcm_plugin *plugin, *next;
  86
  87         plugin = runtime->oss.plugin_first;
  88         while (plugin) {
  89                 next = plugin->next;
  90                 snd_pcm_plugin_free(plugin);
  91                 plugin = next;
  92         }
  93         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
  94         return 0;
  95 }
  96
  97 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
  98 {
  99         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 100         plugin->next = runtime->oss.plugin_first;
 101         plugin->prev = NULL;
 102         if (runtime->oss.plugin_first) {
 103                 runtime->oss.plugin_first->prev = plugin;
 104                 runtime->oss.plugin_first = plugin;
 105         } else {
 106                 runtime->oss.plugin_last =
 107                 runtime->oss.plugin_first = plugin;
 108         }
 109         return 0;
 110 }
 111
 112 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 113 {
 114         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 115         plugin->next = NULL;
 116         plugin->prev = runtime->oss.plugin_last;
 117         if (runtime->oss.plugin_last) {
 118                 runtime->oss.plugin_last->next = plugin;
 119                 runtime->oss.plugin_last = plugin;
 120         } else {
 121                 runtime->oss.plugin_last =
 122                 runtime->oss.plugin_first = plugin;
 123         }
 124         return 0;
 125 }
 126 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 127
 128 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 129 {
 130         struct snd_pcm_runtime *runtime = substream->runtime;
 131         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 132         long bytes = frames_to_bytes(runtime, frames);
 133         if (buffer_size == runtime->oss.buffer_bytes)
 134                 return bytes;
 135 #if BITS_PER_LONG >= 64
 136         return runtime->oss.buffer_bytes * bytes / buffer_size;
 137 #else
 138         {
 139                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 140                 u32 rem;
 141                 div64_32(&bsize, buffer_size, &rem);
 142                 return (long)bsize;
 143         }
 144 #endif
 145 }
 146
 147 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 148 {
 149         struct snd_pcm_runtime *runtime = substream->runtime;
 150         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 151         if (buffer_size == runtime->oss.buffer_bytes)
 152                 return bytes_to_frames(runtime, bytes);
 153         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 154 }
 155
 156 static int snd_pcm_oss_format_from(int format)
 157 {
 158         switch (format) {
 159         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 160         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 161         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 162         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 163         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 164         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 165         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 166         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 167         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 168         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 169         default:                return SNDRV_PCM_FORMAT_U8;
 170         }
 171 }
 172
 173 static int snd_pcm_oss_format_to(int format)
 174 {
 175         switch (format) {
 176         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 177         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 178         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 179         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 180         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 181         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 182         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 183         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 184         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 185         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 186         default:                        return -EINVAL;
 187         }
 188 }
 189
 190 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 191                                    struct snd_pcm_hw_params *oss_params,
 192                                    struct snd_pcm_hw_params *slave_params)
 193 {
 194         size_t s;
 195         size_t oss_buffer_size, oss_period_size, oss_periods;
 196         size_t min_period_size, max_period_size;
 197         struct snd_pcm_runtime *runtime = substream->runtime;
 198         size_t oss_frame_size;
 199
 200         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 201                          params_channels(oss_params) / 8;
 202
 203         oss_buffer_size = snd_pcm_plug_client_size(substream,
 204                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 205         oss_buffer_size = 1 << ld2(oss_buffer_size);
 206         if (atomic_read(&runtime->mmap_count)) {
 207                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 208                         oss_buffer_size = runtime->oss.mmap_bytes;
 209         }
 210
 211         if (substream->oss.setup &&
 212             substream->oss.setup->period_size > 16)
 213                 oss_period_size = substream->oss.setup->period_size;
 214         else if (runtime->oss.fragshift) {
 215                 oss_period_size = 1 << runtime->oss.fragshift;
 216                 if (oss_period_size > oss_buffer_size / 2)
 217                         oss_period_size = oss_buffer_size / 2;
 218         } else {
 219                 int sd;
 220                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 221
 222                 oss_period_size = oss_buffer_size;
 223                 do {
 224                         oss_period_size /= 2;
 225                 } while (oss_period_size > bytes_per_sec);
 226                 if (runtime->oss.subdivision == 0) {
 227                         sd = 4;
 228                         if (oss_period_size / sd > 4096)
 229                                 sd *= 2;
 230                         if (oss_period_size / sd < 4096)
 231                                 sd = 1;
 232                 } else
 233                         sd = runtime->oss.subdivision;
 234                 oss_period_size /= sd;
 235                 if (oss_period_size < 16)
 236                         oss_period_size = 16;
 237         }
 238
 239         min_period_size = snd_pcm_plug_client_size(substream,
 240                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 241         min_period_size *= oss_frame_size;
 242         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
 243         if (oss_period_size < min_period_size)
 244                 oss_period_size = min_period_size;
 245
 246         max_period_size = snd_pcm_plug_client_size(substream,
 247                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 248         max_period_size *= oss_frame_size;
 249         max_period_size = 1 << ld2(max_period_size);
 250         if (oss_period_size > max_period_size)
 251                 oss_period_size = max_period_size;
 252
 253         oss_periods = oss_buffer_size / oss_period_size;
 254
 255         if (substream->oss.setup) {
 256                 if (substream->oss.setup->periods > 1)
 257                         oss_periods = substream->oss.setup->periods;
 258         }
 259
 260         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 261         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 262                 s = runtime->oss.maxfrags;
 263         if (oss_periods > s)
 264                 oss_periods = s;
 265
 266         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 267         if (s < 2)
 268                 s = 2;
 269         if (oss_periods < s)
 270                 oss_periods = s;
 271
 272         while (oss_period_size * oss_periods > oss_buffer_size)
 273                 oss_period_size /= 2;
 274
 275         snd_assert(oss_period_size >= 16, return -EINVAL);
 276         runtime->oss.period_bytes = oss_period_size;
 277         runtime->oss.period_frames = 1;
 278         runtime->oss.periods = oss_periods;
 279         return 0;
 280 }
 281
 282 static int choose_rate(struct snd_pcm_substream *substream,
 283                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 284 {
 285         struct snd_interval *it;
 286         struct snd_pcm_hw_params *save;
 287         unsigned int rate, prev;
 288
 289         save = kmalloc(sizeof(*save), GFP_KERNEL);
 290         if (save == NULL)
 291                 return -ENOMEM;
 292         *save = *params;
 293         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 294
 295         /* try multiples of the best rate */
 296         rate = best_rate;
 297         for (;;) {
 298                 if (it->max < rate || (it->max == rate && it->openmax))
 299                         break;
 300                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 301                         int ret;
 302                         ret = snd_pcm_hw_param_set(substream, params,
 303                                                    SNDRV_PCM_HW_PARAM_RATE,
 304                                                    rate, 0);
 305                         if (ret == (int)rate) {
 306                                 kfree(save);
 307                                 return rate;
 308                         }
 309                         *params = *save;
 310                 }
 311                 prev = rate;
 312                 rate += best_rate;
 313                 if (rate <= prev)
 314                         break;
 315         }
 316
 317         /* not found, use the nearest rate */
 318         kfree(save);
 319         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 320 }
 321
 322 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 323 {
 324         struct snd_pcm_runtime *runtime = substream->runtime;
 325         struct snd_pcm_hw_params *params, *sparams;
 326         struct snd_pcm_sw_params *sw_params;
 327         ssize_t oss_buffer_size, oss_period_size;
 328         size_t oss_frame_size;
 329         int err;
 330         int direct;
 331         int format, sformat, n;
 332         struct snd_mask sformat_mask;
 333         struct snd_mask mask;
 334
 335         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
 336         params = kmalloc(sizeof(*params), GFP_KERNEL);
 337         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 338         if (!sw_params || !params || !sparams) {
 339                 snd_printd("No memory\n");
 340                 err = -ENOMEM;
 341                 goto failure;
 342         }
 343
 344         if (atomic_read(&runtime->mmap_count)) {
 345                 direct = 1;
 346         } else {
 347                 struct snd_pcm_oss_setup *setup = substream->oss.setup;
 348                 direct = (setup != NULL && setup->direct);
 349         }
 350
 351         _snd_pcm_hw_params_any(sparams);
 352         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 353         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 354         snd_mask_none(&mask);
 355         if (atomic_read(&runtime->mmap_count))
 356                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 357         else {
 358                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 359                 if (!direct)
 360                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 361         }
 362         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 363         if (err < 0) {
 364                 snd_printd("No usable accesses\n");
 365                 err = -EINVAL;
 366                 goto failure;
 367         }
 368         choose_rate(substream, sparams, runtime->oss.rate);
 369         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 370
 371         format = snd_pcm_oss_format_from(runtime->oss.format);
 372
 373         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 374         if (direct)
 375                 sformat = format;
 376         else
 377                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 378
 379         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
 380                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
 381                         if (snd_mask_test(&sformat_mask, sformat) &&
 382                             snd_pcm_oss_format_to(sformat) >= 0)
 383                                 break;
 384                 }
 385                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
 386                         snd_printd("Cannot find a format!!!\n");
 387                         err = -EINVAL;
 388                         goto failure;
 389                 }
 390         }
 391         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
 392         snd_assert(err >= 0, goto failure);
 393
 394         if (direct) {
 395                 memcpy(params, sparams, sizeof(*params));
 396         } else {
 397                 _snd_pcm_hw_params_any(params);
 398                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 399                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 400                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 401                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
 402                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 403                                       runtime->oss.channels, 0);
 404                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 405                                       runtime->oss.rate, 0);
 406                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 407                          params_access(params), params_format(params),
 408                          params_channels(params), params_rate(params));
 409         }
 410         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 411                  params_access(sparams), params_format(sparams),
 412                  params_channels(sparams), params_rate(sparams));
 413
 414         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 415                          params_channels(params) / 8;
 416
 417 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 418         snd_pcm_oss_plugin_clear(substream);
 419         if (!direct) {
 420                 /* add necessary plugins */
 421                 snd_pcm_oss_plugin_clear(substream);
 422                 if ((err = snd_pcm_plug_format_plugins(substream,
 423                                                        params,
 424                                                        sparams)) < 0) {
 425                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
 426                         snd_pcm_oss_plugin_clear(substream);
 427                         goto failure;
 428                 }
 429                 if (runtime->oss.plugin_first) {
 430                         struct snd_pcm_plugin *plugin;
 431                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 432                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
 433                                 snd_pcm_oss_plugin_clear(substream);
 434                                 goto failure;
 435                         }
 436                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 437                                 err = snd_pcm_plugin_append(plugin);
 438                         } else {
 439                                 err = snd_pcm_plugin_insert(plugin);
 440                         }
 441                         if (err < 0) {
 442                                 snd_pcm_oss_plugin_clear(substream);
 443                                 goto failure;
 444                         }
 445                 }
 446         }
 447 #endif
 448
 449         err = snd_pcm_oss_period_size(substream, params, sparams);
 450         if (err < 0)
 451                 goto failure;
 452
 453         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 454         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 455         snd_assert(err >= 0, goto failure);
 456
 457         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 458                                      runtime->oss.periods, NULL);
 459         snd_assert(err >= 0, goto failure);
 460
 461         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 462
 463         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 464                 snd_printd("HW_PARAMS failed: %i\n", err);
 465                 goto failure;
 466         }
 467
 468         memset(sw_params, 0, sizeof(*sw_params));
 469         if (runtime->oss.trigger) {
 470                 sw_params->start_threshold = 1;
 471         } else {
 472                 sw_params->start_threshold = runtime->boundary;
 473         }
 474         if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 475                 sw_params->stop_threshold = runtime->boundary;
 476         else
 477                 sw_params->stop_threshold = runtime->buffer_size;
 478         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 479         sw_params->period_step = 1;
 480         sw_params->sleep_min = 0;
 481         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 482                 1 : runtime->period_size;
 483         sw_params->xfer_align = 1;
 484         if (atomic_read(&runtime->mmap_count) ||
 485             (substream->oss.setup && substream->oss.setup->nosilence)) {
 486                 sw_params->silence_threshold = 0;
 487                 sw_params->silence_size = 0;
 488         } else {
 489                 snd_pcm_uframes_t frames;
 490                 frames = runtime->period_size + 16;
 491                 if (frames > runtime->buffer_size)
 492                         frames = runtime->buffer_size;
 493                 sw_params->silence_threshold = frames;
 494                 sw_params->silence_size = frames;
 495         }
 496
 497         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
 498                 snd_printd("SW_PARAMS failed: %i\n", err);
 499                 goto failure;
 500         }
 501
 502         runtime->oss.periods = params_periods(sparams);
 503         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
 504         snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
 505 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 506         if (runtime->oss.plugin_first) {
 507                 err = snd_pcm_plug_alloc(substream, oss_period_size);
 508                 if (err < 0)
 509                         goto failure;
 510         }
 511 #endif
 512         oss_period_size *= oss_frame_size;
 513
 514         oss_buffer_size = oss_period_size * runtime->oss.periods;
 515         snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
 516
 517         runtime->oss.period_bytes = oss_period_size;
 518         runtime->oss.buffer_bytes = oss_buffer_size;
 519
 520         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
 521                  runtime->oss.period_bytes,
 522                  runtime->oss.buffer_bytes);
 523         pdprintf("slave: period_size = %i, buffer_size = %i\n",
 524                  params_period_size(sparams),
 525                  params_buffer_size(sparams));
 526
 527         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
 528         runtime->oss.channels = params_channels(params);
 529         runtime->oss.rate = params_rate(params);
 530
 531         runtime->oss.params = 0;
 532         runtime->oss.prepare = 1;
 533         vfree(runtime->oss.buffer);
 534         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
 535         runtime->oss.buffer_used = 0;
 536         if (runtime->dma_area)
 537                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
 538
 539         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
 540
 541         err = 0;
 542 failure:
 543         kfree(sw_params);
 544         kfree(params);
 545         kfree(sparams);
 546         return err;
 547 }
 548
 549 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
 550 {
 551         int idx, err;
 552         struct snd_pcm_substream *asubstream = NULL, *substream;
 553
 554         for (idx = 0; idx < 2; idx++) {
 555                 substream = pcm_oss_file->streams[idx];
 556                 if (substream == NULL)
 557                         continue;
 558                 if (asubstream == NULL)
 559                         asubstream = substream;
 560                 if (substream->runtime->oss.params) {
 561                         err = snd_pcm_oss_change_params(substream);
 562                         if (err < 0)
 563                                 return err;
 564                 }
 565         }
 566         snd_assert(asubstream != NULL, return -EIO);
 567         if (r_substream)
 568                 *r_substream = asubstream;
 569         return 0;
 570 }
 571
 572 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
 573 {
 574         int err;
 575         struct snd_pcm_runtime *runtime = substream->runtime;
 576
 577         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
 578         if (err < 0) {
 579                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
 580                 return err;
 581         }
 582         runtime->oss.prepare = 0;
 583         runtime->oss.prev_hw_ptr_interrupt = 0;
 584         runtime->oss.period_ptr = 0;
 585         runtime->oss.buffer_used = 0;
 586
 587         return 0;
 588 }
 589
 590 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
 591 {
 592         struct snd_pcm_runtime *runtime;
 593         int err;
 594
 595         if (substream == NULL)
 596                 return 0;
 597         runtime = substream->runtime;
 598         if (runtime->oss.params) {
 599                 err = snd_pcm_oss_change_params(substream);
 600                 if (err < 0)
 601                         return err;
 602         }
 603         if (runtime->oss.prepare) {
 604                 err = snd_pcm_oss_prepare(substream);
 605                 if (err < 0)
 606                         return err;
 607         }
 608         return 0;
 609 }
 610
 611 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
 612 {
 613         struct snd_pcm_runtime *runtime;
 614         snd_pcm_uframes_t frames;
 615         int err = 0;
 616
 617         while (1) {
 618                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
 619                 if (err < 0)
 620                         break;
 621                 runtime = substream->runtime;
 622                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
 623                         break;
 624                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
 625                 /* until avail(delay) <= buffer_size */
 626                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
 627                 frames /= runtime->period_size;
 628                 frames *= runtime->period_size;
 629                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
 630                 if (err < 0)
 631                         break;
 632         }
 633         return err;
 634 }
 635
 636 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
 637 {
 638         struct snd_pcm_runtime *runtime = substream->runtime;
 639         int ret;
 640         while (1) {
 641                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 642                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 643 #ifdef OSS_DEBUG
 644                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 645                                 printk("pcm_oss: write: recovering from XRUN\n");
 646                         else
 647                                 printk("pcm_oss: write: recovering from SUSPEND\n");
 648 #endif
 649                         ret = snd_pcm_oss_prepare(substream);
 650                         if (ret < 0)
 651                                 break;
 652                 }
 653                 if (in_kernel) {
 654                         mm_segment_t fs;
 655                         fs = snd_enter_user();
 656                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
 657                         snd_leave_user(fs);
 658                 } else {
 659                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
 660                 }
 661                 if (ret != -EPIPE && ret != -ESTRPIPE)
 662                         break;
 663                 /* test, if we can't store new data, because the stream */
 664                 /* has not been started */
 665                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
 666                         return -EAGAIN;
 667         }
 668         return ret;
 669 }
 670
 671 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
 672 {
 673         struct snd_pcm_runtime *runtime = substream->runtime;
 674         snd_pcm_sframes_t delay;
 675         int ret;
 676         while (1) {
 677                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 678                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 679 #ifdef OSS_DEBUG
 680                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 681                                 printk("pcm_oss: read: recovering from XRUN\n");
 682                         else
 683                                 printk("pcm_oss: read: recovering from SUSPEND\n");
 684 #endif
 685                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
 686                         if (ret < 0)
 687                                 break;
 688                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
 689                         ret = snd_pcm_oss_prepare(substream);
 690                         if (ret < 0)
 691                                 break;
 692                 }
 693                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
 694                 if (ret < 0)
 695                         break;
 696                 if (in_kernel) {
 697                         mm_segment_t fs;
 698                         fs = snd_enter_user();
 699                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
 700                         snd_leave_user(fs);
 701                 } else {
 702                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
 703                 }
 704                 if (ret == -EPIPE) {
 705                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 706                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 707                                 if (ret < 0)
 708                                         break;
 709                         }
 710                         continue;
 711                 }
 712                 if (ret != -ESTRPIPE)
 713                         break;
 714         }
 715         return ret;
 716 }
 717
 718 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
 719 {
 720         struct snd_pcm_runtime *runtime = substream->runtime;
 721         int ret;
 722         while (1) {
 723                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 724                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 725 #ifdef OSS_DEBUG
 726                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 727                                 printk("pcm_oss: writev: recovering from XRUN\n");
 728                         else
 729                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
 730 #endif
 731                         ret = snd_pcm_oss_prepare(substream);
 732                         if (ret < 0)
 733                                 break;
 734                 }
 735                 if (in_kernel) {
 736                         mm_segment_t fs;
 737                         fs = snd_enter_user();
 738                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
 739                         snd_leave_user(fs);
 740                 } else {
 741                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
 742                 }
 743                 if (ret != -EPIPE && ret != -ESTRPIPE)
 744                         break;
 745
 746                 /* test, if we can't store new data, because the stream */
 747                 /* has not been started */
 748                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
 749                         return -EAGAIN;
 750         }
 751         return ret;
 752 }
 753
 754 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
 755 {
 756         struct snd_pcm_runtime *runtime = substream->runtime;
 757         int ret;
 758         while (1) {
 759                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 760                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 761 #ifdef OSS_DEBUG
 762                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 763                                 printk("pcm_oss: readv: recovering from XRUN\n");
 764                         else
 765                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
 766 #endif
 767                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
 768                         if (ret < 0)
 769                                 break;
 770                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
 771                         ret = snd_pcm_oss_prepare(substream);
 772                         if (ret < 0)
 773                                 break;
 774                 }
 775                 if (in_kernel) {
 776                         mm_segment_t fs;
 777                         fs = snd_enter_user();
 778                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
 779                         snd_leave_user(fs);
 780                 } else {
 781                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
 782                 }
 783                 if (ret != -EPIPE && ret != -ESTRPIPE)
 784                         break;
 785         }
 786         return ret;
 787 }
 788
 789 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
 790 {
 791         struct snd_pcm_runtime *runtime = substream->runtime;
 792         snd_pcm_sframes_t frames, frames1;
 793 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 794         if (runtime->oss.plugin_first) {
 795                 struct snd_pcm_plugin_channel *channels;
 796                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
 797                 if (!in_kernel) {
 798                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
 799                                 return -EFAULT;
 800                         buf = runtime->oss.buffer;
 801                 }
 802                 frames = bytes / oss_frame_bytes;
 803                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
 804                 if (frames1 < 0)
 805                         return frames1;
 806                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
 807                 if (frames1 <= 0)
 808                         return frames1;
 809                 bytes = frames1 * oss_frame_bytes;
 810         } else
 811 #endif
 812         {
 813                 frames = bytes_to_frames(runtime, bytes);
 814                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
 815                 if (frames1 <= 0)
 816                         return frames1;
 817                 bytes = frames_to_bytes(runtime, frames1);
 818         }
 819         return bytes;
 820 }
 821
 822 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
 823 {
 824         size_t xfer = 0;
 825         ssize_t tmp;
 826         struct snd_pcm_runtime *runtime = substream->runtime;
 827
 828         if (atomic_read(&runtime->mmap_count))
 829                 return -ENXIO;
 830
 831         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 832                 return tmp;
 833         while (bytes > 0) {
 834                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 835                         tmp = bytes;
 836                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
 837                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
 838                         if (tmp > 0) {
 839                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
 840                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 841                         }
 842                         runtime->oss.buffer_used += tmp;
 843                         buf += tmp;
 844                         bytes -= tmp;
 845                         xfer += tmp;
 846                         if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
 847                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
 848                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
 849                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
 850                                 if (tmp <= 0)
 851                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 852                                 runtime->oss.bytes += tmp;
 853                                 runtime->oss.period_ptr += tmp;
 854                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
 855                                 if (runtime->oss.period_ptr == 0 ||
 856                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
 857                                         runtime->oss.buffer_used = 0;
 858                                 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
 859                                         return xfer > 0 ? xfer : -EAGAIN;
 860                         }
 861                 } else {
 862                         tmp = snd_pcm_oss_write2(substream,
 863                                                  (const char __force *)buf,
 864                                                  runtime->oss.period_bytes, 0);
 865                         if (tmp <= 0)
 866                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 867                         runtime->oss.bytes += tmp;
 868                         buf += tmp;
 869                         bytes -= tmp;
 870                         xfer += tmp;
 871                         if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
 872                             tmp != runtime->oss.period_bytes)
 873                                 break;
 874                 }
 875         }
 876         return xfer;
 877 }
 878
 879 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
 880 {
 881         struct snd_pcm_runtime *runtime = substream->runtime;
 882         snd_pcm_sframes_t frames, frames1;
 883 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 884         char __user *final_dst = (char __user *)buf;
 885         if (runtime->oss.plugin_first) {
 886                 struct snd_pcm_plugin_channel *channels;
 887                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
 888                 if (!in_kernel)
 889                         buf = runtime->oss.buffer;
 890                 frames = bytes / oss_frame_bytes;
 891                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
 892                 if (frames1 < 0)
 893                         return frames1;
 894                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
 895                 if (frames1 <= 0)
 896                         return frames1;
 897                 bytes = frames1 * oss_frame_bytes;
 898                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
 899                         return -EFAULT;
 900         } else
 901 #endif
 902         {
 903                 frames = bytes_to_frames(runtime, bytes);
 904                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
 905                 if (frames1 <= 0)
 906                         return frames1;
 907                 bytes = frames_to_bytes(runtime, frames1);
 908         }
 909         return bytes;
 910 }
 911
 912 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
 913 {
 914         size_t xfer = 0;
 915         ssize_t tmp;
 916         struct snd_pcm_runtime *runtime = substream->runtime;
 917
 918         if (atomic_read(&runtime->mmap_count))
 919                 return -ENXIO;
 920
 921         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 922                 return tmp;
 923         while (bytes > 0) {
 924                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 925                         if (runtime->oss.buffer_used == 0) {
 926                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
 927                                 if (tmp <= 0)
 928                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 929                                 runtime->oss.bytes += tmp;
 930                                 runtime->oss.period_ptr = tmp;
 931                                 runtime->oss.buffer_used = tmp;
 932                         }
 933                         tmp = bytes;
 934                         if ((size_t) tmp > runtime->oss.buffer_used)
 935                                 tmp = runtime->oss.buffer_used;
 936                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
 937                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 938                         buf += tmp;
 939                         bytes -= tmp;
 940                         xfer += tmp;
 941                         runtime->oss.buffer_used -= tmp;
 942                 } else {
 943                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
 944                                                 runtime->oss.period_bytes, 0);
 945                         if (tmp <= 0)
 946                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 947                         runtime->oss.bytes += tmp;
 948                         buf += tmp;
 949                         bytes -= tmp;
 950                         xfer += tmp;
 951                 }
 952         }
 953         return xfer;
 954 }
 955
 956 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
 957 {
 958         struct snd_pcm_substream *substream;
 959
 960         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 961         if (substream != NULL) {
 962                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 963                 substream->runtime->oss.prepare = 1;
 964         }
 965         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
 966         if (substream != NULL) {
 967                 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 968                 substream->runtime->oss.prepare = 1;
 969         }
 970         return 0;
 971 }
 972
 973 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
 974 {
 975         struct snd_pcm_substream *substream;
 976         int err;
 977
 978         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 979         if (substream != NULL) {
 980                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
 981                         return err;
 982                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
 983         }
 984         /* note: all errors from the start action are ignored */
 985         /* OSS apps do not know, how to handle them */
 986         return 0;
 987 }
 988
 989 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
 990 {
 991         struct snd_pcm_runtime *runtime;
 992         ssize_t result = 0;
 993         long res;
 994         wait_queue_t wait;
 995
 996         runtime = substream->runtime;
 997         init_waitqueue_entry(&wait, current);
 998         add_wait_queue(&runtime->sleep, &wait);
 999 #ifdef OSS_DEBUG
1000         printk("sync1: size = %li\n", size);
1001 #endif
1002         while (1) {
1003                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
1004                 if (result > 0) {
1005                         runtime->oss.buffer_used = 0;
1006                         result = 0;
1007                         break;
1008                 }
1009                 if (result != 0 && result != -EAGAIN)
1010                         break;
1011                 result = 0;
1012                 set_current_state(TASK_INTERRUPTIBLE);
1013                 snd_pcm_stream_lock_irq(substream);
1014                 res = runtime->status->state;
1015                 snd_pcm_stream_unlock_irq(substream);
1016                 if (res != SNDRV_PCM_STATE_RUNNING) {
1017                         set_current_state(TASK_RUNNING);
1018                         break;
1019                 }
1020                 res = schedule_timeout(10 * HZ);
1021                 if (signal_pending(current)) {
1022                         result = -ERESTARTSYS;
1023                         break;
1024                 }
1025                 if (res == 0) {
1026                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1027                         result = -EIO;
1028                         break;
1029                 }
1030         }
1031         remove_wait_queue(&runtime->sleep, &wait);
1032         return result;
1033 }
1034
1035 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1036 {
1037         int err = 0;
1038         unsigned int saved_f_flags;
1039         struct snd_pcm_substream *substream;
1040         struct snd_pcm_runtime *runtime;
1041         snd_pcm_format_t format;
1042         unsigned long width;
1043         size_t size;
1044
1045         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1046         if (substream != NULL) {
1047                 runtime = substream->runtime;
1048                 if (atomic_read(&runtime->mmap_count))
1049                         goto __direct;
1050                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1051                         return err;
1052                 format = snd_pcm_oss_format_from(runtime->oss.format);
1053                 width = snd_pcm_format_physical_width(format);
1054                 if (runtime->oss.buffer_used > 0) {
1055 #ifdef OSS_DEBUG
1056                         printk("sync: buffer_used\n");
1057 #endif
1058                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1059                         snd_pcm_format_set_silence(format,
1060                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1061                                                    size);
1062                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1063                         if (err < 0)
1064                                 return err;
1065                 } else if (runtime->oss.period_ptr > 0) {
1066 #ifdef OSS_DEBUG
1067                         printk("sync: period_ptr\n");
1068 #endif
1069                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1070                         snd_pcm_format_set_silence(format,
1071                                                    runtime->oss.buffer,
1072                                                    size * 8 / width);
1073                         err = snd_pcm_oss_sync1(substream, size);
1074                         if (err < 0)
1075                                 return err;
1076                 }
1077                 /*
1078                  * The ALSA's period might be a bit large than OSS one.
1079                  * Fill the remain portion of ALSA period with zeros.
1080                  */
1081                 size = runtime->control->appl_ptr % runtime->period_size;
1082                 if (size > 0) {
1083                         size = runtime->period_size - size;
1084                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1085                                 size = (runtime->frame_bits * size) / 8;
1086                                 while (size > 0) {
1087                                         mm_segment_t fs;
1088                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1089                                         size -= size1;
1090                                         size1 *= 8;
1091                                         size1 /= runtime->sample_bits;
1092                                         snd_pcm_format_set_silence(runtime->format,
1093                                                                    runtime->oss.buffer,
1094                                                                    size1);
1095                                         fs = snd_enter_user();
1096                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1097                                         snd_leave_user(fs);
1098                                 }
1099                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1100                                 void __user *buffers[runtime->channels];
1101                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1102                                 snd_pcm_lib_writev(substream, buffers, size);
1103                         }
1104                 }
1105                 /*
1106                  * finish sync: drain the buffer
1107                  */
1108               __direct:
1109                 saved_f_flags = substream->ffile->f_flags;
1110                 substream->ffile->f_flags &= ~O_NONBLOCK;
1111                 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1112                 substream->ffile->f_flags = saved_f_flags;
1113                 if (err < 0)
1114                         return err;
1115                 runtime->oss.prepare = 1;
1116         }
1117
1118         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1119         if (substream != NULL) {
1120                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1121                         return err;
1122                 runtime = substream->runtime;
1123                 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1124                 if (err < 0)
1125                         return err;
1126                 runtime->oss.buffer_used = 0;
1127                 runtime->oss.prepare = 1;
1128         }
1129         return 0;
1130 }
1131
1132 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1133 {
1134         int idx;
1135
1136         for (idx = 1; idx >= 0; --idx) {
1137                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1138                 struct snd_pcm_runtime *runtime;
1139                 if (substream == NULL)
1140                         continue;
1141                 runtime = substream->runtime;
1142                 if (rate < 1000)
1143                         rate = 1000;
1144                 else if (rate > 192000)
1145                         rate = 192000;
1146                 if (runtime->oss.rate != rate) {
1147                         runtime->oss.params = 1;
1148                         runtime->oss.rate = rate;
1149                 }
1150         }
1151         return snd_pcm_oss_get_rate(pcm_oss_file);
1152 }
1153
1154 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1155 {
1156         struct snd_pcm_substream *substream;
1157         int err;
1158
1159         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1160                 return err;
1161         return substream->runtime->oss.rate;
1162 }
1163
1164 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1165 {
1166         int idx;
1167         if (channels < 1)
1168                 channels = 1;
1169         if (channels > 128)
1170                 return -EINVAL;
1171         for (idx = 1; idx >= 0; --idx) {
1172                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1173                 struct snd_pcm_runtime *runtime;
1174                 if (substream == NULL)
1175                         continue;
1176                 runtime = substream->runtime;
1177                 if (runtime->oss.channels != channels) {
1178                         runtime->oss.params = 1;
1179                         runtime->oss.channels = channels;
1180                 }
1181         }
1182         return snd_pcm_oss_get_channels(pcm_oss_file);
1183 }
1184
1185 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1186 {
1187         struct snd_pcm_substream *substream;
1188         int err;
1189
1190         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1191                 return err;
1192         return substream->runtime->oss.channels;
1193 }
1194
1195 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1196 {
1197         struct snd_pcm_substream *substream;
1198         int err;
1199
1200         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1201                 return err;
1202         return substream->runtime->oss.period_bytes;
1203 }
1204
1205 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1206 {
1207         struct snd_pcm_substream *substream;
1208         int err;
1209         int direct;
1210         struct snd_pcm_hw_params *params;
1211         unsigned int formats = 0;
1212         struct snd_mask format_mask;
1213         int fmt;
1214
1215         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1216                 return err;
1217         if (atomic_read(&substream->runtime->mmap_count)) {
1218                 direct = 1;
1219         } else {
1220                 struct snd_pcm_oss_setup *setup = substream->oss.setup;
1221                 direct = (setup != NULL && setup->direct);
1222         }
1223         if (!direct)
1224                 return AFMT_MU_LAW | AFMT_U8 |
1225                        AFMT_S16_LE | AFMT_S16_BE |
1226                        AFMT_S8 | AFMT_U16_LE |
1227                        AFMT_U16_BE;
1228         params = kmalloc(sizeof(*params), GFP_KERNEL);
1229         if (!params)
1230                 return -ENOMEM;
1231         _snd_pcm_hw_params_any(params);
1232         err = snd_pcm_hw_refine(substream, params);
1233         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1234         kfree(params);
1235         snd_assert(err >= 0, return err);
1236         for (fmt = 0; fmt < 32; ++fmt) {
1237                 if (snd_mask_test(&format_mask, fmt)) {
1238                         int f = snd_pcm_oss_format_to(fmt);
1239                         if (f >= 0)
1240                                 formats |= f;
1241                 }
1242         }
1243         return formats;
1244 }
1245
1246 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1247 {
1248         int formats, idx;
1249
1250         if (format != AFMT_QUERY) {
1251                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1252                 if (!(formats & format))
1253                         format = AFMT_U8;
1254                 for (idx = 1; idx >= 0; --idx) {
1255                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1256                         struct snd_pcm_runtime *runtime;
1257                         if (substream == NULL)
1258                                 continue;
1259                         runtime = substream->runtime;
1260                         if (runtime->oss.format != format) {
1261                                 runtime->oss.params = 1;
1262                                 runtime->oss.format = format;
1263                         }
1264                 }
1265         }
1266         return snd_pcm_oss_get_format(pcm_oss_file);
1267 }
1268
1269 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1270 {
1271         struct snd_pcm_substream *substream;
1272         int err;
1273
1274         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1275                 return err;
1276         return substream->runtime->oss.format;
1277 }
1278
1279 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1280 {
1281         struct snd_pcm_runtime *runtime;
1282
1283         if (substream == NULL)
1284                 return 0;
1285         runtime = substream->runtime;
1286         if (subdivide == 0) {
1287                 subdivide = runtime->oss.subdivision;
1288                 if (subdivide == 0)
1289                         subdivide = 1;
1290                 return subdivide;
1291         }
1292         if (runtime->oss.subdivision || runtime->oss.fragshift)
1293                 return -EINVAL;
1294         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1295             subdivide != 8 && subdivide != 16)
1296                 return -EINVAL;
1297         runtime->oss.subdivision = subdivide;
1298         runtime->oss.params = 1;
1299         return subdivide;
1300 }
1301
1302 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1303 {
1304         int err = -EINVAL, idx;
1305
1306         for (idx = 1; idx >= 0; --idx) {
1307                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1308                 if (substream == NULL)
1309                         continue;
1310                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1311                         return err;
1312         }
1313         return err;
1314 }
1315
1316 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1317 {
1318         struct snd_pcm_runtime *runtime;
1319
1320         if (substream == NULL)
1321                 return 0;
1322         runtime = substream->runtime;
1323         if (runtime->oss.subdivision || runtime->oss.fragshift)
1324                 return -EINVAL;
1325         runtime->oss.fragshift = val & 0xffff;
1326         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1327         if (runtime->oss.fragshift < 4)         /* < 16 */
1328                 runtime->oss.fragshift = 4;
1329         if (runtime->oss.maxfrags < 2)
1330                 runtime->oss.maxfrags = 2;
1331         runtime->oss.params = 1;
1332         return 0;
1333 }
1334
1335 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1336 {
1337         int err = -EINVAL, idx;
1338
1339         for (idx = 1; idx >= 0; --idx) {
1340                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1341                 if (substream == NULL)
1342                         continue;
1343                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1344                         return err;
1345         }
1346         return err;
1347 }
1348
1349 static int snd_pcm_oss_nonblock(struct file * file)
1350 {
1351         file->f_flags |= O_NONBLOCK;
1352         return 0;
1353 }
1354
1355 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1356 {
1357
1358         if (substream == NULL) {
1359                 res &= ~DSP_CAP_DUPLEX;
1360                 return res;
1361         }
1362 #ifdef DSP_CAP_MULTI
1363         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1364                 if (substream->pstr->substream_count > 1)
1365                         res |= DSP_CAP_MULTI;
1366 #endif
1367         /* DSP_CAP_REALTIME is set all times: */
1368         /* all ALSA drivers can return actual pointer in ring buffer */
1369 #if defined(DSP_CAP_REALTIME) && 0
1370         {
1371                 struct snd_pcm_runtime *runtime = substream->runtime;
1372                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1373                         res &= ~DSP_CAP_REALTIME;
1374         }
1375 #endif
1376         return res;
1377 }
1378
1379 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1380 {
1381         int result, idx;
1382
1383         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1384         for (idx = 0; idx < 2; idx++) {
1385                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1386                 result = snd_pcm_oss_get_caps1(substream, result);
1387         }
1388         result |= 0x0001;       /* revision - same as SB AWE 64 */
1389         return result;
1390 }
1391
1392 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1393 {
1394         struct snd_pcm_runtime *runtime = substream->runtime;
1395         snd_pcm_uframes_t appl_ptr;
1396         appl_ptr = hw_ptr + runtime->buffer_size;
1397         appl_ptr %= runtime->boundary;
1398         runtime->control->appl_ptr = appl_ptr;
1399 }
1400
1401 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1402 {
1403         struct snd_pcm_runtime *runtime;
1404         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1405         int err, cmd;
1406
1407 #ifdef OSS_DEBUG
1408         printk("pcm_oss: trigger = 0x%x\n", trigger);
1409 #endif
1410
1411         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1412         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1413
1414         if (psubstream) {
1415                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1416                         return err;
1417         }
1418         if (csubstream) {
1419                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1420                         return err;
1421         }
1422         if (psubstream) {
1423                 runtime = psubstream->runtime;
1424                 if (trigger & PCM_ENABLE_OUTPUT) {
1425                         if (runtime->oss.trigger)
1426                                 goto _skip1;
1427                         if (atomic_read(&psubstream->runtime->mmap_count))
1428                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1429                         runtime->oss.trigger = 1;
1430                         runtime->start_threshold = 1;
1431                         cmd = SNDRV_PCM_IOCTL_START;
1432                 } else {
1433                         if (!runtime->oss.trigger)
1434                                 goto _skip1;
1435                         runtime->oss.trigger = 0;
1436                         runtime->start_threshold = runtime->boundary;
1437                         cmd = SNDRV_PCM_IOCTL_DROP;
1438                         runtime->oss.prepare = 1;
1439                 }
1440                 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1441                 if (err < 0)
1442                         return err;
1443         }
1444  _skip1:
1445         if (csubstream) {
1446                 runtime = csubstream->runtime;
1447                 if (trigger & PCM_ENABLE_INPUT) {
1448                         if (runtime->oss.trigger)
1449                                 goto _skip2;
1450                         runtime->oss.trigger = 1;
1451                         runtime->start_threshold = 1;
1452                         cmd = SNDRV_PCM_IOCTL_START;
1453                 } else {
1454                         if (!runtime->oss.trigger)
1455                                 goto _skip2;
1456                         runtime->oss.trigger = 0;
1457                         runtime->start_threshold = runtime->boundary;
1458                         cmd = SNDRV_PCM_IOCTL_DROP;
1459                         runtime->oss.prepare = 1;
1460                 }
1461                 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1462                 if (err < 0)
1463                         return err;
1464         }
1465  _skip2:
1466         return 0;
1467 }
1468
1469 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1470 {
1471         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1472         int result = 0;
1473
1474         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1475         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1476         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1477                 result |= PCM_ENABLE_OUTPUT;
1478         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1479                 result |= PCM_ENABLE_INPUT;
1480         return result;
1481 }
1482
1483 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1484 {
1485         struct snd_pcm_substream *substream;
1486         struct snd_pcm_runtime *runtime;
1487         snd_pcm_sframes_t delay;
1488         int err;
1489
1490         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1491         if (substream == NULL)
1492                 return -EINVAL;
1493         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1494                 return err;
1495         runtime = substream->runtime;
1496         if (runtime->oss.params || runtime->oss.prepare)
1497                 return 0;
1498         err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1499         if (err == -EPIPE)
1500                 delay = 0;      /* hack for broken OSS applications */
1501         else if (err < 0)
1502                 return err;
1503         return snd_pcm_oss_bytes(substream, delay);
1504 }
1505
1506 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1507 {
1508         struct snd_pcm_substream *substream;
1509         struct snd_pcm_runtime *runtime;
1510         snd_pcm_sframes_t delay;
1511         int fixup;
1512         struct count_info info;
1513         int err;
1514
1515         if (_info == NULL)
1516                 return -EFAULT;
1517         substream = pcm_oss_file->streams[stream];
1518         if (substream == NULL)
1519                 return -EINVAL;
1520         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1521                 return err;
1522         runtime = substream->runtime;
1523         if (runtime->oss.params || runtime->oss.prepare) {
1524                 memset(&info, 0, sizeof(info));
1525                 if (copy_to_user(_info, &info, sizeof(info)))
1526                         return -EFAULT;
1527                 return 0;
1528         }
1529         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1530                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1531                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1532                         err = 0;
1533                         delay = 0;
1534                         fixup = 0;
1535                 } else {
1536                         fixup = runtime->oss.buffer_used;
1537                 }
1538         } else {
1539                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1540                 fixup = -runtime->oss.buffer_used;
1541         }
1542         if (err < 0)
1543                 return err;
1544         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1545         if (atomic_read(&runtime->mmap_count)) {
1546                 snd_pcm_sframes_t n;
1547                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1548                 if (n < 0)
1549                         n += runtime->boundary;
1550                 info.blocks = n / runtime->period_size;
1551                 runtime->oss.prev_hw_ptr_interrupt = delay;
1552                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1553                         snd_pcm_oss_simulate_fill(substream, delay);
1554                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1555         } else {
1556                 delay = snd_pcm_oss_bytes(substream, delay);
1557                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1558                         struct snd_pcm_oss_setup *setup = substream->oss.setup;
1559                         if (setup && setup->buggyptr)
1560                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1561                         else
1562                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1563                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1564                 } else {
1565                         delay += fixup;
1566                         info.blocks = delay / runtime->oss.period_bytes;
1567                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1568                 }
1569         }
1570         if (copy_to_user(_info, &info, sizeof(info)))
1571                 return -EFAULT;
1572         return 0;
1573 }
1574
1575 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1576 {
1577         struct snd_pcm_substream *substream;
1578         struct snd_pcm_runtime *runtime;
1579         snd_pcm_sframes_t avail;
1580         int fixup;
1581         struct audio_buf_info info;
1582         int err;
1583
1584         if (_info == NULL)
1585                 return -EFAULT;
1586         substream = pcm_oss_file->streams[stream];
1587         if (substream == NULL)
1588                 return -EINVAL;
1589         runtime = substream->runtime;
1590
1591         if (runtime->oss.params &&
1592             (err = snd_pcm_oss_change_params(substream)) < 0)
1593                 return err;
1594
1595         info.fragsize = runtime->oss.period_bytes;
1596         info.fragstotal = runtime->periods;
1597         if (runtime->oss.prepare) {
1598                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1599                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1600                         info.fragments = runtime->oss.periods;
1601                 } else {
1602                         info.bytes = 0;
1603                         info.fragments = 0;
1604                 }
1605         } else {
1606                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1607                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1608                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1609                                 avail = runtime->buffer_size;
1610                                 err = 0;
1611                                 fixup = 0;
1612                         } else {
1613                                 avail = runtime->buffer_size - avail;
1614                                 fixup = -runtime->oss.buffer_used;
1615                         }
1616                 } else {
1617                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1618                         fixup = runtime->oss.buffer_used;
1619                 }
1620                 if (err < 0)
1621                         return err;
1622                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1623                 info.fragments = info.bytes / runtime->oss.period_bytes;
1624         }
1625
1626 #ifdef OSS_DEBUG
1627         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1628 #endif
1629         if (copy_to_user(_info, &info, sizeof(info)))
1630                 return -EFAULT;
1631         return 0;
1632 }
1633
1634 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1635 {
1636         // it won't be probably implemented
1637         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1638         return -EINVAL;
1639 }
1640
1641 static struct snd_pcm_oss_setup *snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, const char *task_name)
1642 {
1643         const char *ptr, *ptrl;
1644         struct snd_pcm_oss_setup *setup;
1645
1646         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
1647         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1648                 if (!strcmp(setup->task_name, task_name)) {
1649                         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1650                         return setup;
1651                 }
1652         }
1653         ptr = ptrl = task_name;
1654         while (*ptr) {
1655                 if (*ptr == '/')
1656                         ptrl = ptr + 1;
1657                 ptr++;
1658         }
1659         if (ptrl == task_name) {
1660                 goto __not_found;
1661                 return NULL;
1662         }
1663         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1664                 if (!strcmp(setup->task_name, ptrl)) {
1665                         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1666                         return setup;
1667                 }
1668         }
1669       __not_found:
1670         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1671         return NULL;
1672 }
1673
1674 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
1675                                        struct snd_pcm_oss_setup *setup,
1676                                        int minor)
1677 {
1678         struct snd_pcm_runtime *runtime;
1679
1680         substream->oss.oss = 1;
1681         substream->oss.setup = setup;
1682         runtime = substream->runtime;
1683         runtime->oss.params = 1;
1684         runtime->oss.trigger = 1;
1685         runtime->oss.rate = 8000;
1686         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1687         case SNDRV_MINOR_OSS_PCM_8:
1688                 runtime->oss.format = AFMT_U8;
1689                 break;
1690         case SNDRV_MINOR_OSS_PCM_16:
1691                 runtime->oss.format = AFMT_S16_LE;
1692                 break;
1693         default:
1694                 runtime->oss.format = AFMT_MU_LAW;
1695         }
1696         runtime->oss.channels = 1;
1697         runtime->oss.fragshift = 0;
1698         runtime->oss.maxfrags = 0;
1699         runtime->oss.subdivision = 0;
1700 }
1701
1702 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
1703 {
1704         struct snd_pcm_runtime *runtime;
1705         runtime = substream->runtime;
1706         vfree(runtime->oss.buffer);
1707 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1708         snd_pcm_oss_plugin_clear(substream);
1709 #endif
1710         substream->oss.file = NULL;
1711         substream->oss.oss = 0;
1712 }
1713
1714 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1715 {
1716         int cidx;
1717         snd_assert(pcm_oss_file != NULL, return -ENXIO);
1718         for (cidx = 0; cidx < 2; ++cidx) {
1719                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
1720                 struct snd_pcm_runtime *runtime;
1721                 if (substream == NULL)
1722                         continue;
1723                 runtime = substream->runtime;
1724
1725                 snd_pcm_stream_lock_irq(substream);
1726                 if (snd_pcm_running(substream))
1727                         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1728                 snd_pcm_stream_unlock_irq(substream);
1729                 if (substream->ffile != NULL) {
1730                         if (substream->ops->hw_free != NULL)
1731                                 substream->ops->hw_free(substream);
1732                         substream->ops->close(substream);
1733                         substream->ffile = NULL;
1734                 }
1735                 snd_pcm_oss_release_substream(substream);
1736                 snd_pcm_release_substream(substream);
1737         }
1738         kfree(pcm_oss_file);
1739         return 0;
1740 }
1741
1742 static int snd_pcm_oss_open_file(struct file *file,
1743                                  struct snd_pcm *pcm,
1744                                  struct snd_pcm_oss_file **rpcm_oss_file,
1745                                  int minor,
1746                                  struct snd_pcm_oss_setup *psetup,
1747                                  struct snd_pcm_oss_setup *csetup)
1748 {
1749         int err = 0;
1750         struct snd_pcm_oss_file *pcm_oss_file;
1751         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1752         unsigned int f_mode = file->f_mode;
1753
1754         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1755         *rpcm_oss_file = NULL;
1756
1757         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1758         if (pcm_oss_file == NULL)
1759                 return -ENOMEM;
1760
1761         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1762             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1763                 f_mode = FMODE_WRITE;
1764         if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1765                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1766                                                &psubstream)) < 0) {
1767                         snd_pcm_oss_release_file(pcm_oss_file);
1768                         return err;
1769                 }
1770                 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1771         }
1772         if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1773                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
1774                                                &csubstream)) < 0) {
1775                         if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1776                                 snd_pcm_oss_release_file(pcm_oss_file);
1777                                 return err;
1778                         } else {
1779                                 csubstream = NULL;
1780                         }
1781                 }
1782                 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1783         }
1784
1785         if (psubstream == NULL && csubstream == NULL) {
1786                 snd_pcm_oss_release_file(pcm_oss_file);
1787                 return -EINVAL;
1788         }
1789         if (psubstream != NULL) {
1790                 psubstream->oss.file = pcm_oss_file;
1791                 err = snd_pcm_hw_constraints_init(psubstream);
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 = psubstream->ops->open(psubstream)) < 0) {
1798                         snd_pcm_oss_release_file(pcm_oss_file);
1799                         return err;
1800                 }
1801                 psubstream->ffile = file;
1802                 err = snd_pcm_hw_constraints_complete(psubstream);
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(psubstream, psetup, minor);
1809         }
1810         if (csubstream != NULL) {
1811                 csubstream->oss.file = pcm_oss_file;
1812                 err = snd_pcm_hw_constraints_init(csubstream);
1813                 if (err < 0) {
1814                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1815                         snd_pcm_oss_release_file(pcm_oss_file);
1816                         return err;
1817                 }
1818                 if ((err = csubstream->ops->open(csubstream)) < 0) {
1819                         snd_pcm_oss_release_file(pcm_oss_file);
1820                         return err;
1821                 }
1822                 csubstream->ffile = file;
1823                 err = snd_pcm_hw_constraints_complete(csubstream);
1824                 if (err < 0) {
1825                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1826                         snd_pcm_oss_release_file(pcm_oss_file);
1827                         return err;
1828                 }
1829                 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1830         }
1831
1832         file->private_data = pcm_oss_file;
1833         *rpcm_oss_file = pcm_oss_file;
1834         return 0;
1835 }
1836
1837
1838 static int snd_task_name(struct task_struct *task, char *name, size_t size)
1839 {
1840         unsigned int idx;
1841
1842         snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
1843         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
1844                 name[idx] = task->comm[idx];
1845         name[idx] = '\0';
1846         return 0;
1847 }
1848
1849 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1850 {
1851         int err;
1852         char task_name[32];
1853         struct snd_pcm *pcm;
1854         struct snd_pcm_oss_file *pcm_oss_file;
1855         struct snd_pcm_oss_setup *psetup = NULL, *csetup = NULL;
1856         int nonblock;
1857         wait_queue_t wait;
1858
1859         pcm = snd_lookup_oss_minor_data(iminor(inode),
1860                                         SNDRV_OSS_DEVICE_TYPE_PCM);
1861         if (pcm == NULL) {
1862                 err = -ENODEV;
1863                 goto __error1;
1864         }
1865         err = snd_card_file_add(pcm->card, file);
1866         if (err < 0)
1867                 goto __error1;
1868         if (!try_module_get(pcm->card->module)) {
1869                 err = -EFAULT;
1870                 goto __error2;
1871         }
1872         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1873                 err = -EFAULT;
1874                 goto __error;
1875         }
1876         if (file->f_mode & FMODE_WRITE)
1877                 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1878         if (file->f_mode & FMODE_READ)
1879                 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1880
1881         nonblock = !!(file->f_flags & O_NONBLOCK);
1882         if (psetup && !psetup->disable) {
1883                 if (psetup->nonblock)
1884                         nonblock = 1;
1885                 else if (psetup->block)
1886                         nonblock = 0;
1887         } else if (csetup && !csetup->disable) {
1888                 if (csetup->nonblock)
1889                         nonblock = 1;
1890                 else if (csetup->block)
1891                         nonblock = 0;
1892         }
1893         if (!nonblock)
1894                 nonblock = nonblock_open;
1895
1896         init_waitqueue_entry(&wait, current);
1897         add_wait_queue(&pcm->open_wait, &wait);
1898         mutex_lock(&pcm->open_mutex);
1899         while (1) {
1900                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1901                                             iminor(inode), psetup, csetup);
1902                 if (err >= 0)
1903                         break;
1904                 if (err == -EAGAIN) {
1905                         if (nonblock) {
1906                                 err = -EBUSY;
1907                                 break;
1908                         }
1909                 } else
1910                         break;
1911                 set_current_state(TASK_INTERRUPTIBLE);
1912                 mutex_unlock(&pcm->open_mutex);
1913                 schedule();
1914                 mutex_lock(&pcm->open_mutex);
1915                 if (signal_pending(current)) {
1916                         err = -ERESTARTSYS;
1917                         break;
1918                 }
1919         }
1920         remove_wait_queue(&pcm->open_wait, &wait);
1921         mutex_unlock(&pcm->open_mutex);
1922         if (err < 0)
1923                 goto __error;
1924         return err;
1925
1926       __error:
1927         module_put(pcm->card->module);
1928       __error2:
1929         snd_card_file_remove(pcm->card, file);
1930       __error1:
1931         return err;
1932 }
1933
1934 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1935 {
1936         struct snd_pcm *pcm;
1937         struct snd_pcm_substream *substream;
1938         struct snd_pcm_oss_file *pcm_oss_file;
1939
1940         pcm_oss_file = file->private_data;
1941         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1942         if (substream == NULL)
1943                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1944         snd_assert(substream != NULL, return -ENXIO);
1945         pcm = substream->pcm;
1946         snd_pcm_oss_sync(pcm_oss_file);
1947         mutex_lock(&pcm->open_mutex);
1948         snd_pcm_oss_release_file(pcm_oss_file);
1949         mutex_unlock(&pcm->open_mutex);
1950         wake_up(&pcm->open_wait);
1951         module_put(pcm->card->module);
1952         snd_card_file_remove(pcm->card, file);
1953         return 0;
1954 }
1955
1956 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1957 {
1958         struct snd_pcm_oss_file *pcm_oss_file;
1959         int __user *p = (int __user *)arg;
1960         int res;
1961
1962         pcm_oss_file = file->private_data;
1963         if (cmd == OSS_GETVERSION)
1964                 return put_user(SNDRV_OSS_VERSION, p);
1965         if (cmd == OSS_ALSAEMULVER)
1966                 return put_user(1, p);
1967 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1968         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
1969                 struct snd_pcm_substream *substream;
1970                 int idx;
1971                 for (idx = 0; idx < 2; ++idx) {
1972                         substream = pcm_oss_file->streams[idx];
1973                         if (substream != NULL)
1974                                 break;
1975                 }
1976                 snd_assert(substream != NULL, return -ENXIO);
1977                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1978         }
1979 #endif
1980         if (((cmd >> 8) & 0xff) != 'P')
1981                 return -EINVAL;
1982 #ifdef OSS_DEBUG
1983         printk("pcm_oss: ioctl = 0x%x\n", cmd);
1984 #endif
1985         switch (cmd) {
1986         case SNDCTL_DSP_RESET:
1987                 return snd_pcm_oss_reset(pcm_oss_file);
1988         case SNDCTL_DSP_SYNC:
1989                 return snd_pcm_oss_sync(pcm_oss_file);
1990         case SNDCTL_DSP_SPEED:
1991                 if (get_user(res, p))
1992                         return -EFAULT;
1993                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1994                         return res;
1995                 return put_user(res, p);
1996         case SOUND_PCM_READ_RATE:
1997                 res = snd_pcm_oss_get_rate(pcm_oss_file);
1998                 if (res < 0)
1999                         return res;
2000                 return put_user(res, p);
2001         case SNDCTL_DSP_STEREO:
2002                 if (get_user(res, p))
2003                         return -EFAULT;
2004                 res = res > 0 ? 2 : 1;
2005                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
2006                         return res;
2007                 return put_user(--res, p);
2008         case SNDCTL_DSP_GETBLKSIZE:
2009                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
2010                 if (res < 0)
2011                         return res;
2012                 return put_user(res, p);
2013         case SNDCTL_DSP_SETFMT:
2014                 if (get_user(res, p))
2015                         return -EFAULT;
2016                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2017                 if (res < 0)
2018                         return res;
2019                 return put_user(res, p);
2020         case SOUND_PCM_READ_BITS:
2021                 res = snd_pcm_oss_get_format(pcm_oss_file);
2022                 if (res < 0)
2023                         return res;
2024                 return put_user(res, p);
2025         case SNDCTL_DSP_CHANNELS:
2026                 if (get_user(res, p))
2027                         return -EFAULT;
2028                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2029                 if (res < 0)
2030                         return res;
2031                 return put_user(res, p);
2032         case SOUND_PCM_READ_CHANNELS:
2033                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2034                 if (res < 0)
2035                         return res;
2036                 return put_user(res, p);
2037         case SOUND_PCM_WRITE_FILTER:
2038         case SOUND_PCM_READ_FILTER:
2039                 return -EIO;
2040         case SNDCTL_DSP_POST:
2041                 return snd_pcm_oss_post(pcm_oss_file);
2042         case SNDCTL_DSP_SUBDIVIDE:
2043                 if (get_user(res, p))
2044                         return -EFAULT;
2045                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2046                 if (res < 0)
2047                         return res;
2048                 return put_user(res, p);
2049         case SNDCTL_DSP_SETFRAGMENT:
2050                 if (get_user(res, p))
2051                         return -EFAULT;
2052                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2053         case SNDCTL_DSP_GETFMTS:
2054                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2055                 if (res < 0)
2056                         return res;
2057                 return put_user(res, p);
2058         case SNDCTL_DSP_GETOSPACE:
2059         case SNDCTL_DSP_GETISPACE:
2060                 return snd_pcm_oss_get_space(pcm_oss_file,
2061                         cmd == SNDCTL_DSP_GETISPACE ?
2062                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2063                         (struct audio_buf_info __user *) arg);
2064         case SNDCTL_DSP_NONBLOCK:
2065                 return snd_pcm_oss_nonblock(file);
2066         case SNDCTL_DSP_GETCAPS:
2067                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2068                 if (res < 0)
2069                         return res;
2070                 return put_user(res, p);
2071         case SNDCTL_DSP_GETTRIGGER:
2072                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2073                 if (res < 0)
2074                         return res;
2075                 return put_user(res, p);
2076         case SNDCTL_DSP_SETTRIGGER:
2077                 if (get_user(res, p))
2078                         return -EFAULT;
2079                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2080         case SNDCTL_DSP_GETIPTR:
2081         case SNDCTL_DSP_GETOPTR:
2082                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2083                         cmd == SNDCTL_DSP_GETIPTR ?
2084                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2085                         (struct count_info __user *) arg);
2086         case SNDCTL_DSP_MAPINBUF:
2087         case SNDCTL_DSP_MAPOUTBUF:
2088                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2089                         cmd == SNDCTL_DSP_MAPINBUF ?
2090                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2091                         (struct buffmem_desc __user *) arg);
2092         case SNDCTL_DSP_SETSYNCRO:
2093                 /* stop DMA now.. */
2094                 return 0;
2095         case SNDCTL_DSP_SETDUPLEX:
2096                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2097                         return 0;
2098                 return -EIO;
2099         case SNDCTL_DSP_GETODELAY:
2100                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2101                 if (res < 0) {
2102                         /* it's for sure, some broken apps don't check for error codes */
2103                         put_user(0, p);
2104                         return res;
2105                 }
2106                 return put_user(res, p);
2107         case SNDCTL_DSP_PROFILE:
2108                 return 0;       /* silently ignore */
2109         default:
2110                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2111         }
2112         return -EINVAL;
2113 }
2114
2115 #ifdef CONFIG_COMPAT
2116 /* all compatible */
2117 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2118 #else
2119 #define snd_pcm_oss_ioctl_compat        NULL
2120 #endif
2121
2122 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2123 {
2124         struct snd_pcm_oss_file *pcm_oss_file;
2125         struct snd_pcm_substream *substream;
2126
2127         pcm_oss_file = file->private_data;
2128         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2129         if (substream == NULL)
2130                 return -ENXIO;
2131 #ifndef OSS_DEBUG
2132         return snd_pcm_oss_read1(substream, buf, count);
2133 #else
2134         {
2135                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2136                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2137                 return res;
2138         }
2139 #endif
2140 }
2141
2142 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2143 {
2144         struct snd_pcm_oss_file *pcm_oss_file;
2145         struct snd_pcm_substream *substream;
2146         long result;
2147
2148         pcm_oss_file = file->private_data;
2149         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2150         if (substream == NULL)
2151                 return -ENXIO;
2152         result = snd_pcm_oss_write1(substream, buf, count);
2153 #ifdef OSS_DEBUG
2154         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2155 #endif
2156         return result;
2157 }
2158
2159 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2160 {
2161         struct snd_pcm_runtime *runtime = substream->runtime;
2162         if (atomic_read(&runtime->mmap_count))
2163                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2164         else
2165                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2166 }
2167
2168 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2169 {
2170         struct snd_pcm_runtime *runtime = substream->runtime;
2171         if (atomic_read(&runtime->mmap_count))
2172                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2173         else
2174                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2175 }
2176
2177 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2178 {
2179         struct snd_pcm_oss_file *pcm_oss_file;
2180         unsigned int mask;
2181         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2182
2183         pcm_oss_file = file->private_data;
2184
2185         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2186         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2187
2188         mask = 0;
2189         if (psubstream != NULL) {
2190                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2191                 poll_wait(file, &runtime->sleep, wait);
2192                 snd_pcm_stream_lock_irq(psubstream);
2193                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2194                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2195                      snd_pcm_oss_playback_ready(psubstream)))
2196                         mask |= POLLOUT | POLLWRNORM;
2197                 snd_pcm_stream_unlock_irq(psubstream);
2198         }
2199         if (csubstream != NULL) {
2200                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2201                 snd_pcm_state_t ostate;
2202                 poll_wait(file, &runtime->sleep, wait);
2203                 snd_pcm_stream_lock_irq(csubstream);
2204                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2205                     snd_pcm_oss_capture_ready(csubstream))
2206                         mask |= POLLIN | POLLRDNORM;
2207                 snd_pcm_stream_unlock_irq(csubstream);
2208                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2209                         struct snd_pcm_oss_file ofile;
2210                         memset(&ofile, 0, sizeof(ofile));
2211                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2212                         runtime->oss.trigger = 0;
2213                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2214                 }
2215         }
2216
2217         return mask;
2218 }
2219
2220 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2221 {
2222         struct snd_pcm_oss_file *pcm_oss_file;
2223         struct snd_pcm_substream *substream = NULL;
2224         struct snd_pcm_runtime *runtime;
2225         int err;
2226
2227 #ifdef OSS_DEBUG
2228         printk("pcm_oss: mmap begin\n");
2229 #endif
2230         pcm_oss_file = file->private_data;
2231         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2232         case VM_READ | VM_WRITE:
2233                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2234                 if (substream)
2235                         break;
2236                 /* Fall through */
2237         case VM_READ:
2238                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2239                 break;
2240         case VM_WRITE:
2241                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2242                 break;
2243         default:
2244                 return -EINVAL;
2245         }
2246         /* set VM_READ access as well to fix memset() routines that do
2247            reads before writes (to improve performance) */
2248         area->vm_flags |= VM_READ;
2249         if (substream == NULL)
2250                 return -ENXIO;
2251         runtime = substream->runtime;
2252         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2253                 return -EIO;
2254         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2255                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2256         else
2257                 return -EIO;
2258
2259         if (runtime->oss.params) {
2260                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2261                         return err;
2262         }
2263 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2264         if (runtime->oss.plugin_first != NULL)
2265                 return -EIO;
2266 #endif
2267
2268         if (area->vm_pgoff != 0)
2269                 return -EINVAL;
2270
2271         err = snd_pcm_mmap_data(substream, file, area);
2272         if (err < 0)
2273                 return err;
2274         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2275         runtime->silence_threshold = 0;
2276         runtime->silence_size = 0;
2277 #ifdef OSS_DEBUG
2278         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2279 #endif
2280         /* In mmap mode we never stop */
2281         runtime->stop_threshold = runtime->boundary;
2282
2283         return 0;
2284 }
2285
2286 #ifdef CONFIG_PROC_FS
2287 /*
2288  *  /proc interface
2289  */
2290
2291 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2292                                   struct snd_info_buffer *buffer)
2293 {
2294         struct snd_pcm_str *pstr = entry->private_data;
2295         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2296         mutex_lock(&pstr->oss.setup_mutex);
2297         while (setup) {
2298                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2299                             setup->task_name,
2300                             setup->periods,
2301                             setup->period_size,
2302                             setup->disable ? " disable" : "",
2303                             setup->direct ? " direct" : "",
2304                             setup->block ? " block" : "",
2305                             setup->nonblock ? " non-block" : "",
2306                             setup->partialfrag ? " partial-frag" : "",
2307                             setup->nosilence ? " no-silence" : "");
2308                 setup = setup->next;
2309         }
2310         mutex_unlock(&pstr->oss.setup_mutex);
2311 }
2312
2313 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2314 {
2315         unsigned int idx;
2316         struct snd_pcm_substream *substream;
2317         struct snd_pcm_oss_setup *setup, *setupn;
2318
2319         for (idx = 0, substream = pstr->substream;
2320              idx < pstr->substream_count; idx++, substream = substream->next)
2321                 substream->oss.setup = NULL;
2322         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2323              setup; setup = setupn) {
2324                 setupn = setup->next;
2325                 kfree(setup->task_name);
2326                 kfree(setup);
2327         }
2328         pstr->oss.setup_list = NULL;
2329 }
2330
2331 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2332                                    struct snd_info_buffer *buffer)
2333 {
2334         struct snd_pcm_str *pstr = entry->private_data;
2335         char line[128], str[32], task_name[32], *ptr;
2336         int idx1;
2337         struct snd_pcm_oss_setup *setup, *setup1, template;
2338
2339         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2340                 mutex_lock(&pstr->oss.setup_mutex);
2341                 memset(&template, 0, sizeof(template));
2342                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2343                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2344                         snd_pcm_oss_proc_free_setup_list(pstr);
2345                         mutex_unlock(&pstr->oss.setup_mutex);
2346                         continue;
2347                 }
2348                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2349                         if (!strcmp(setup->task_name, task_name)) {
2350                                 template = *setup;
2351                                 break;
2352                         }
2353                 }
2354                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2355                 template.periods = simple_strtoul(str, NULL, 10);
2356                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2357                 template.period_size = simple_strtoul(str, NULL, 10);
2358                 for (idx1 = 31; idx1 >= 0; idx1--)
2359                         if (template.period_size & (1 << idx1))
2360                                 break;
2361                 for (idx1--; idx1 >= 0; idx1--)
2362                         template.period_size &= ~(1 << idx1);
2363                 do {
2364                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2365                         if (!strcmp(str, "disable")) {
2366                                 template.disable = 1;
2367                         } else if (!strcmp(str, "direct")) {
2368                                 template.direct = 1;
2369                         } else if (!strcmp(str, "block")) {
2370                                 template.block = 1;
2371                         } else if (!strcmp(str, "non-block")) {
2372                                 template.nonblock = 1;
2373                         } else if (!strcmp(str, "partial-frag")) {
2374                                 template.partialfrag = 1;
2375                         } else if (!strcmp(str, "no-silence")) {
2376                                 template.nosilence = 1;
2377                         } else if (!strcmp(str, "buggy-ptr")) {
2378                                 template.buggyptr = 1;
2379                         }
2380                 } while (*str);
2381                 if (setup == NULL) {
2382                         setup = kmalloc(sizeof(struct snd_pcm_oss_setup), GFP_KERNEL);
2383                         if (setup) {
2384                                 if (pstr->oss.setup_list == NULL) {
2385                                         pstr->oss.setup_list = setup;
2386                                 } else {
2387                                         for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2388                                         setup1->next = setup;
2389                                 }
2390                                 template.task_name = kstrdup(task_name, GFP_KERNEL);
2391                         } else {
2392                                 buffer->error = -ENOMEM;
2393                         }
2394                 }
2395                 if (setup)
2396                         *setup = template;
2397                 mutex_unlock(&pstr->oss.setup_mutex);
2398         }
2399 }
2400
2401 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2402 {
2403         int stream;
2404         for (stream = 0; stream < 2; ++stream) {
2405                 struct snd_info_entry *entry;
2406                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2407                 if (pstr->substream_count == 0)
2408                         continue;
2409                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2410                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2411                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2412                         entry->c.text.read_size = 8192;
2413                         entry->c.text.read = snd_pcm_oss_proc_read;
2414                         entry->c.text.write_size = 8192;
2415                         entry->c.text.write = snd_pcm_oss_proc_write;
2416                         entry->private_data = pstr;
2417                         if (snd_info_register(entry) < 0) {
2418                                 snd_info_free_entry(entry);
2419                                 entry = NULL;
2420                         }
2421                 }
2422                 pstr->oss.proc_entry = entry;
2423         }
2424 }
2425
2426 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2427 {
2428         int stream;
2429         for (stream = 0; stream < 2; ++stream) {
2430                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2431                 if (pstr->oss.proc_entry) {
2432                         snd_info_unregister(pstr->oss.proc_entry);
2433                         pstr->oss.proc_entry = NULL;
2434                         snd_pcm_oss_proc_free_setup_list(pstr);
2435                 }
2436         }
2437 }
2438 #else /* !CONFIG_PROC_FS */
2439 #define snd_pcm_oss_proc_init(pcm)
2440 #define snd_pcm_oss_proc_done(pcm)
2441 #endif /* CONFIG_PROC_FS */
2442
2443 /*
2444  *  ENTRY functions
2445  */
2446
2447 static struct file_operations snd_pcm_oss_f_reg =
2448 {
2449         .owner =        THIS_MODULE,
2450         .read =         snd_pcm_oss_read,
2451         .write =        snd_pcm_oss_write,
2452         .open =         snd_pcm_oss_open,
2453         .release =      snd_pcm_oss_release,
2454         .poll =         snd_pcm_oss_poll,
2455         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2456         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2457         .mmap =         snd_pcm_oss_mmap,
2458 };
2459
2460 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2461 {
2462         char name[128];
2463         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2464         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2465                                     pcm->card, index, &snd_pcm_oss_f_reg,
2466                                     pcm, name) < 0) {
2467                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2468                            pcm->card->number, pcm->device);
2469         }
2470 }
2471
2472 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2473 {
2474         pcm->oss.reg = 0;
2475         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2476                 char name[128];
2477                 int duplex;
2478                 register_oss_dsp(pcm, 0);
2479                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2480                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2481                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2482                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2483 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2484                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2485                                       pcm->card->number,
2486                                       name);
2487 #endif
2488                 pcm->oss.reg++;
2489                 pcm->oss.reg_mask |= 1;
2490         }
2491         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2492                 register_oss_dsp(pcm, 1);
2493                 pcm->oss.reg++;
2494                 pcm->oss.reg_mask |= 2;
2495         }
2496
2497         if (pcm->oss.reg)
2498                 snd_pcm_oss_proc_init(pcm);
2499
2500         return 0;
2501 }
2502
2503 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2504 {
2505         if (pcm->oss.reg) {
2506                 if (pcm->oss.reg_mask & 1) {
2507                         pcm->oss.reg_mask &= ~1;
2508                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2509                                                   pcm->card, 0);
2510                 }
2511                 if (pcm->oss.reg_mask & 2) {
2512                         pcm->oss.reg_mask &= ~2;
2513                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2514                                                   pcm->card, 1);
2515                 }
2516         }
2517         return 0;
2518 }
2519
2520 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
2521 {
2522         snd_pcm_oss_disconnect_minor(pcm);
2523         if (pcm->oss.reg) {
2524                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2525 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2526                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2527 #endif
2528                 }
2529                 pcm->oss.reg = 0;
2530                 snd_pcm_oss_proc_done(pcm);
2531         }
2532         return 0;
2533 }
2534
2535 static struct snd_pcm_notify snd_pcm_oss_notify =
2536 {
2537         .n_register =   snd_pcm_oss_register_minor,
2538         .n_disconnect = snd_pcm_oss_disconnect_minor,
2539         .n_unregister = snd_pcm_oss_unregister_minor,
2540 };
2541
2542 static int __init alsa_pcm_oss_init(void)
2543 {
2544         int i;
2545         int err;
2546
2547         /* check device map table */
2548         for (i = 0; i < SNDRV_CARDS; i++) {
2549                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2550                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
2551                                    i, dsp_map[i]);
2552                         dsp_map[i] = 0;
2553                 }
2554                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2555                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
2556                                    i, adsp_map[i]);
2557                         adsp_map[i] = 1;
2558                 }
2559         }
2560         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2561                 return err;
2562         return 0;
2563 }
2564
2565 static void __exit alsa_pcm_oss_exit(void)
2566 {
2567         snd_pcm_notify(&snd_pcm_oss_notify, 1);
2568 }
2569
2570 module_init(alsa_pcm_oss_init)
2571 module_exit(alsa_pcm_oss_exit)